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                                                                   EXHIBIT 10.36

                       ONE HUNDRED THIRTY-SIXTH AMENDMENT
                                     TO THE
            SECOND AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT
                                       OF
                  SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP

      THIS ONE HUNDRED THIRTY-SIXTH AMENDMENT TO THE SECOND AMENDED AND RESTATED
LIMITED PARTNERSHIP AGREEMENT OF SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP
(this "AMENDMENT") is made and entered into as of April 16, 2001, by SUN
COMMUNITIES, INC., a Maryland corporation (the "GENERAL PARTNER"), as the
general partner of SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan
limited partnership (the "PARTNERSHIP"), and RIVER HAVEN VILLAGE, INC., a
Michigan corporation (the "Series B-1 Preferred Partner").

                                    RECITALS

      A. The Series B-1 Preferred Partner and the Partnership are parties to
that certain Amended and Restated Contribution Agreement dated February 1, 2001
(the "Contribution Agreement"), pursuant to which the Series B-1 Preferred
Partner has agreed to contribute to the Partnership the Project (as defined in
the Contribution Agreement) in consideration for the issuance by the Partnership
of Series B-1 Preferred Units (as hereinafter defined).

      B. The signatories hereto desire to amend that certain Second Amended and
Restated Limited Partnership Agreement of Sun Communities Operating Limited
Partnership, dated as of April 30, 1996, as amended by those certain amendments
numbered one through one hundred thirty-five  (collectively, as amended, the
"Agreement") as set forth herein; any capitalized term not defined herein shall
have the respective meaning ascribed to it in the Agreement.

      C. Section 11 of the Agreement authorizes the General Partner, as the
holder of more than fifty percent (50%) of the OP Units, to amend the Agreement.

      NOW, THEREFORE, in consideration of the foregoing, of the mutual promises
set forth herein, and of other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound, agree to continue the Partnership and amend the Agreement as
follows:

      1. Admission of New Partners. As of the date hereof, the Series B-1
Preferred Partner has contributed the Project, with a net agreed upon value of
$4,611,692.48., to the Partnership in exchange for the issuance to the Series
B-1 Preferred Partner of 46,117 Series B-1 Preferred Units. The Series B-1
Preferred Units issued to the Series B-1 Preferred Partner have been duly issued
and fully paid. The Series B-1 Preferred Partner is hereby admitted to the
Partnership, effective as of April 16, 2001, as a new Limited Partner, and by
execution of this Amendment the Series B-1 Preferred Partner has agreed to be
bound by all of the terms and conditions of the Agreement, as amended hereby,
and hereby acknowledges receipt of a copy of the Agreement. Exhibit A of the
Agreement is hereby deleted in its entirety and is replaced with EXHIBIT A to
this Amendment.

      2. Sections 3.1 and 3.2. Sections 3.1 and 3.2 of the Agreement are hereby
deleted in their entirety and replaced with the following:

      "3.1 OP UNITS
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            The Partners' interests in the Partnership are expressed in terms of
      OP Units and each Partner has been issued OP Units corresponding to the
      agreed value of its capital contribution. OP Units consist of Common OP
      Units, Preferred OP Units, Series A Preferred Units, Series B Preferred
      Units and Series B-1 Preferred Units.

      3.2 COMMON OP UNITS

            The holders of the Common OP Units shall be entitled to receive
      distributions in accordance with Section 4.3, after payment of all accrued
      (i) Preferred Dividends, (ii) Series A Priority Return, (iii) Series B
      Priority Return and (iv) Series B-1 Priority Return. No distribution shall
      be made in respect of Common OP Units while any accrued (i) Preferred
      Dividends, (ii) Series A Priority Return, (iii) Series B Priority Return
      or (iv) Series B-1 Priority Return remains unpaid unless all such unpaid
      amounts are paid simultaneously with such distribution."

      3. Section 4.2 (a)(v) of the Agreement is hereby deleted in its entirety
and replaced with the following:

            "(v) fifth, with respect to OP Units other than Series A Preferred
      Units, pro rata in proportion to the number of OP Units other than Series
      A Preferred Units, held by each such Partner as of the last day of the
      period for which such allocation is being made; provided, however, that
      the profits allocated to any Preferred OP Units, Series B Preferred Units
      and Series B-1 Preferred Units pursuant to this Section 4.2(b)(v) for any
      calendar year shall not exceed the amount of Preferred Dividends, Series B
      Priority Return and Series B-1 Priority Return, respectively, thereon for
      that calendar year, and any such excess profits remaining after the
      application of such limitation shall be allocated to the holders of the
      Common OP Units, pro rata."

      4. Section 8.2(a) of the Agreement is hereby deleted in its entirety and
replaced with the following:

      "8.2 LIQUIDATING DISTRIBUTIONS; RESTORATION OF CAPITAL ACCOUNT DEFICITS

            Upon the liquidation of the Partnership or any Partner's interest in
      the Partnership, within the meaning of the Allocation Regulations:

                  (a) The capital accounts of the holders of the OP Units shall
      be adjusted to reflect the manner in which any unrealized income, gain,
      loss and deduction inherent in the Partnership's property, which has not
      previously been reflected in the Partners' capital accounts, would be
      allocated among the Partners if there were a taxable disposition of such
      property at fair market value on the date of distribution. Any resulting
      increase in the Partners' capital accounts shall be allocated (i) first to
      the holders of the Preferred OP Units and Series A Preferred Units in
      proportions and amounts sufficient to bring their respective capital
      account balances up to the amount of the Issue Prices of their respective
      Preferred OP Units and Series A Preferred Units plus accrued and unpaid
      Preferred Dividends or Series A Priority Return, as the case may be,
      thereon, (ii) second to the holders of the Series B Cumulative Preferred
      Units in proportions and amounts sufficient to bring their respective
      capital account balances up to the amount of the Issue Price of the Series
      B Cumulative Preferred Units plus accrued and unpaid Series B Priority
      Return and Series B-1 Priority Return, as applicable, thereon, and (iii)
      third (if any) to the Common OP Units. Any resulting decrease in the
      Partners' capital accounts shall first be allocated (i) first to the
      holders of the Common OP Units in proportions and amounts sufficient to
      reduce their respective capital account balances to zero, (ii) second to
      the holders of Series B

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      Cumulative Preferred Units in proportions and amounts sufficient to reduce
      their respective capital account balances to zero, (iii) third to the
      holders of the Preferred OP Units and Series A Preferred Units in
      proportions and amounts sufficient to reduce their respective capital
      account balances to zero, and (iv) (if any) to the General Partner.
      Liquidating distributions shall be made in accordance with the positive
      capital account balances of the Partners, after giving effect to such
      adjustment and other capital account adjustments for the current year, as
      provided in the Allocation Regulations.

      5. Section 14. Section 14 of the Agreement is hereby amended as follows:

            (a) The second sentence of the definition of "OP UNITS" is hereby
      deleted in its entirety and replaced with the following: "OP Units consist
      of Common OP Units, Preferred OP Units, Series A Preferred Units, Series B
      Preferred Units and Series B-1 Preferred Units."

            (c) The following new definitions are inserted in Section 14
      (Definitions) so as to preserve alphabetical order, and the definition of
      "Series B Preferred Unit Distribution Payment Date" and "Series B Default"
      shall be deleted:

                  "SERIES B CUMULATIVE PREFERRED UNITS" shall have the meaning
            set forth therefor in Section 17.1 hereof.

                  "SERIES B CUMULATIVE PREFERRED UNIT DISTRIBUTION PAYMENT DATE"
            shall have the meaning set forth therefor in Section 17.3(a) hereof.

                  "SERIES B DEFAULT" shall have the meaning set forth therefor
            in Section 17.5(a)(ii) hereof.

                  "SERIES B-1 ISSUANCE DATE" shall mean April 16, 2001.

                  "SERIES B-1 PREFERRED PARTNER" means River Haven Village,
            Inc., a Michigan corporation, and its successors and permitted
            assigns.

                  "SERIES B-1 PREFERRED UNITS" shall have the meaning set forth
            therefor in Section 17.2 hereof.

                  "SERIES B-1 PRIORITY RETURN" shall have the meaning set forth
            therefor in Section 17.1 hereof.

                  "SERIES B-1 REDEMPTION PRICE" shall mean $100 per Series B-1
            Preferred Unit redeemed.

      6. Section 17 of the Agreement is hereby deleted in its entirety and
replaced with the following:

      "17. SERIES B CUMULATIVE PREFERRED UNITS.

            SECTION 17.1 DEFINITIONS. The term "SERIES B CUMULATIVE PREFERRED
      UNITS" shall mean the Series B Preferred Units and the Series B-1
      Preferred Units. The term "SERIES B PARITY PREFERRED UNITS" shall mean any
      class or series of OP Units of the Partnership now or hereafter
      authorized, issued or outstanding and expressly designated by the
      Partnership to rank on parity with the Series B Preferred Units and Series
      B-1 Preferred Units with respect to distributions and

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      rights upon voluntary or involuntary liquidation, winding-up or
      dissolution of the Partnership. The term "SERIES B PRIORITY RETURN" shall
      mean an amount equal to (i) 7.0% per annum for the First 24 Month Period,
      (ii) 7.5% per annum for the Second 24 Month Period, (iii) 8.0% per annum
      for the First 12 Month Period, and (iv) 9.0% per annum for the Second 12
      Month Period (determined on the basis of a 365 day year), of the stated
      amount of $100.00 per Series B Preferred Unit multiplied by the number of
      outstanding Series B Preferred Units, cumulative to the extent not
      distributed for any given distribution period pursuant to Section 4.3
      hereof. The term "SERIES B-1 PRIORITY RETURN" shall mean an amount equal
      to (i) 6.85% per annum commencing on and including the Series B-1 Issuance
      Date and ending on and including October 15, 2003, (ii) 7.2% per annum
      commencing on and including October 16, 2003 and ending on and including
      April 15, 2006, (iii) 7.6% per annum commencing on and including April 16,
      2006 and ending on and including April 15, 2008, (iv) 8.36% per annum
      commencing on and including April 16, 2008 and ending on and including
      April 15, 2010, and (v) 9.19% per annum thereafter (determined on the
      basis of a 365 day year), of the stated amount of $100.00 per Series B-1
      Preferred Unit multiplied by the number of outstanding Series B-1
      Preferred Units, cumulative to the extent not distributed for any given
      distribution period pursuant to Section 4.3 hereof

            SECTION 17.2 DESIGNATION AND NUMBER. A series of OP Units in the
      Partnership designated as the "SERIES B CUMULATIVE PREFERRED UNITS" is
      hereby established. Of such Series B Cumulative Preferred Units there
      shall be designated Series B Preferred Units ("SERIES B PREFERRED UNITS")
      and Series B-1 Preferred Units ("SERIES B-1 PREFERRED UNITS"). The number
      of Series B Preferred Units shall be 35,637 and the number of Series B-1
      Preferred Units shall be 46,117.

            SECTION 17.3 DISTRIBUTIONS.

                  (a) Payment of Distributions.

                        (i) Subject to the rights of holders of Series A
                  Preferred Units, Parity Preferred Units, Preferred OP Units
                  and Series B Parity Preferred Units as to the payment of
                  distributions pursuant to Sections 4.3, 8.2 and 16.3 of the
                  Agreement, holders of Series B Preferred Units and Series B-1
                  Preferred Units shall be entitled to receive, when, as and if
                  declared by the Partnership acting through the General
                  Partner, out of the Partnership's available cash, the Series B
                  Priority Return and Series B-1 Priority Return, respectively.

                        (ii) All distributions shall be cumulative, shall accrue
                  from the original date of issuance and will be payable (i)
                  quarterly (such quarterly periods for purposes of payment and
                  accrual will be the quarterly periods ending on the dates
                  specified in this sentence) in arrears, on March 31, June 30,
                  September 30 and December 31 of each year, and (ii) in the
                  event of a redemption of Series B Cumulative Preferred Units,
                  on the redemption date (each a "SERIES B CUMULATIVE PREFERRED
                  UNIT DISTRIBUTION PAYMENT DATE"). The amount of the
                  distribution payable for any period will be computed on the
                  basis of a 365-day year and for any period shorter than a full
                  quarterly period for which distributions are computed, the
                  amount of the distribution payable will be computed based on
                  the ratio of the actual number of days elapsed in such period
                  to the actual number of days in such quarterly period. If any
                  date on which distributions are to be made on the Series B
                  Cumulative Preferred Units is not a Business Day (as defined
                  in SECTION 14), then payment of the distribution to be made on
                  such date will be made on the next succeeding day that is a
                  Business Day (and without any

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                  interest or other payment in respect of any such delay) except
                  that, if such Business Day is in the next succeeding calendar
                  year, such payment shall be made on the immediately preceding
                  Business Day, in each case with the same force and effect as
                  if made on such date. Distributions on the Series B Cumulative
                  Preferred Units will be made to the holders of record of the
                  Series B Cumulative Preferred Units on the relevant record
                  dates to be fixed by the Partnership acting through the
                  General Partner, which record dates shall in no event exceed
                  fifteen (15) Business Days prior to the relevant Series B
                  Cumulative Preferred Unit Distribution Payment Date.

                  (b) Distributions Cumulative. Distributions on the Series B
            Cumulative Preferred Units will accrue whether or not the terms and
            provisions of any agreement of the Partnership, including any
            agreement relating to its indebtedness at any time prohibit the
            declaration, setting aside for payment or current payment of
            distributions, whether or not the Partnership has earnings, whether
            or not there are funds legally available for the payment of such of
            such distributions and whether or not such distributions are
            authorized. Accrued but unpaid distributions on the Series B
            Cumulative Preferred Units will accumulate as of the Series B
            Cumulative Preferred Unit Distribution Payment Date on which they
            first become payable. Distributions on account of arrears for any
            past distribution periods may be declared and paid at any time,
            without reference to a regular Series B Cumulative Preferred Unit
            Distribution Payment Date to holders of record of the Series B
            Cumulative Preferred Units on the record date fixed by the
            Partnership acting through the General Partner which date shall not
            exceed fifteen (15) Business Days prior to the payment date.
            Accumulated and unpaid distributions will not bear interest.

                  (c) Priority as to Distributions.

                        (i) So long as any Series B Cumulative Preferred Units
                  are outstanding, no distribution of cash or other property
                  shall be authorized, declared, paid or set apart for payment
                  on or with respect to any class or series of OP Units of the
                  Partnership ranking junior as to the payment of distributions
                  or rights upon a voluntary or involuntary liquidation,
                  dissolution or winding-up of the Partnership to the Series B
                  Cumulative Preferred Units (collectively, "SERIES B JUNIOR
                  UNITS"), nor shall any cash or other property be set aside for
                  or applied to the purchase, redemption or other acquisition
                  for consideration of any Series B Cumulative Preferred Units,
                  any Series B Parity Preferred Units or any Series B Junior
                  Units, unless, in each case, all distributions accumulated on
                  all Series B Cumulative Preferred Units and all classes and
                  series of outstanding Series B Parity Preferred Units have
                  been paid in full. The foregoing sentence will not prohibit
                  (a) distributions payable solely in OP Units ranking junior to
                  the Series B Cumulative Preferred Units as to the payment of
                  distributions and rights upon a voluntary or involuntary
                  liquidation, dissolution or winding-up of the Partnership, (b)
                  the conversion of Series B Junior Units or Series B Parity
                  Preferred Units into OP Units of the Partnership ranking
                  junior to the Series B Cumulative Preferred Units as to
                  distributions and rights upon a voluntary or involuntary
                  liquidation, dissolution or winding-up of the Partnership, or
                  (c) the redemption of OP Units corresponding to any Junior
                  Stock (as defined in the Series A Articles Supplementary) to
                  be purchased by the General Partner pursuant to Article VII of
                  the Charter to preserve the General Partner's status as a real
                  estate investment trust, provided that such redemption shall
                  be upon the same terms as the corresponding purchase pursuant
                  to Article VII of the Charter.

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                        (ii) So long as distributions have not been paid in full
                  (or a sum sufficient for such full payment is not irrevocably
                  deposited in trust for immediate payment) upon the Series B
                  Cumulative Preferred Units, all distributions authorized and
                  declared on the Series B Cumulative Preferred Units and all
                  classes or series of outstanding Series B Parity Preferred
                  Units shall be authorized and declared so that the amount of
                  distributions authorized and declared per Series B Cumulative
                  Preferred Unit and such other classes or series of Series B
                  Parity Preferred Units shall in all cases bear to each other
                  the same ratio that accrued distributions per Series B
                  Cumulative Preferred Unit and such other classes or series of
                  Series B Parity Preferred Units (which shall not include any
                  accumulation in respect of unpaid distributions for prior
                  distribution periods if such class or series of Series B
                  Parity Preferred Units do not have cumulative distribution
                  rights) bear to each other.

                        (iii) The Series B Cumulative Preferred Units and any
                  Series B Parity Preferred Units shall be deemed to be "Junior
                  Units" as defined in Section 16.3(c) hereof, and so long as
                  any Series A Preferred Units or Parity Preferred Units are
                  outstanding, no distribution of cash or other property shall
                  be authorized, declared, paid or set apart for payment on or
                  with respect to the Series B Cumulative Preferred Units or any
                  Series B Parity Preferred Units, nor shall any cash or other
                  property be set aside for or applied to the purchase,
                  redemption or other acquisition for consideration of any
                  Series B Cumulative Preferred Units or Series B Parity
                  Preferred Units unless, in each case, all distributions
                  accumulated on all Series A Preferred Units and all classes
                  and series of outstanding Parity Preferred Units have been
                  paid in full.

                  (d) Distributions on OP Units held by General Partner.
            Notwithstanding anything to the contrary herein, distributions on OP
            Units held by the General Partner may be made, without preserving
            the priority of distributions described in Section 17.3(c)(i) and
            (ii), but only to the extent such distributions are required to
            preserve the real estate investment trust status of the General
            Partner.

                  (e) No Further Rights. Holders of Series B Cumulative
            Preferred Units shall not be entitled to any distributions, whether
            payable in cash, other property or otherwise, in excess of the full
            cumulative distributions described herein.

            SECTION 17.4 LIQUIDATION PROCEEDS.

                  (a) Notice. Written notice of any voluntary or involuntary
            liquidation, dissolution or winding-up of the Partnership, stating
            the payment date or dates when, and the place or places where, the
            amounts distributable in such circumstances shall be payable, shall
            be given by (i) fax and (ii) by first class mail, postage pre-paid,
            not less than thirty (30) and not more than sixty (60) days prior to
            the payment date stated therein, to each record holder of the Series
            B Cumulative Preferred Units at the respective addresses of such
            holders as the same shall appear on the transfer records of the
            Partnership.

                  (b) No Further Rights. After payment of the full amount of the
            liquidating distributions to which they are entitled pursuant to
            Section 8.2 hereof, the holders of

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            Series B Cumulative Preferred Units will have no right or claim to
            any of the remaining assets of the Partnership.

                  (c) Consolidation, Merger or Certain Other Transactions. The
            voluntary sale, conveyance, lease, exchange or transfer (for cash,
            shares of stock, securities or other consideration) of all or
            substantially all of the property or assets of the General Partner
            to, or the consolidation or merger or other business combination of
            the Partnership with or into, any corporation, trust, partnership,
            limited liability company or other entity (or of any corporation,
            trust, partnership, limited liability company or other entity with
            or into the Partnership) shall not be deemed to constitute a
            liquidation, dissolution or winding-up of the Partnership.

            SECTION 17.5 REDEMPTION.

                  (a) Series B Preferred

                        (i) Mandatory Redemption. Subject to the limitations in
                  this Section 17.5, the holders of Series B Preferred Units may
                  request redemption of, and the Partnership shall redeem, for
                  cash, Series B Preferred Units on the following terms and
                  subject to the following conditions:

                              (A) On May 1, 2003 the holders of Series B
                        Preferred Units may require that the Partnership redeem
                        an aggregate of 10,000 Series B Preferred Units upon not
                        less than sixty (60) days prior written notice, at the
                        Series B Redemption Price.

                              (B) On May 1, 2004 and May 1, 2005 the holders of
                        Series B Preferred Units may require that the
                        Partnership redeem all outstanding Series B Preferred
                        Units upon not less than sixty (60) days prior written
                        notice at the Series B Redemption Price.

                              (C) On May 1, 2006, the Partnership shall redeem
                        all outstanding Series B Preferred Units at the Series B
                        Redemption Price.

                        (ii) Redemption in the Event of a Series B Default. The
                  Partnership shall redeem, for cash, all outstanding Series B
                  Preferred Units at the Series B Redemption Price in the event
                  the Partnership fails to declare and pay on any Series B
                  Cumulative Preferred Unit Distribution Payment Date the Series
                  B Priority Return for any reason including the failure to
                  declare a distribution of the Series B Priority Return (a
                  "SERIES B DEFAULT"). Such redemption shall occur fifteen (15)
                  days after written demand of the holders of Series B Preferred
                  Units is received by the Partnership, provided such notice is
                  received by the Partnership no later than thirty (30) days
                  after the Series B Cumulative Preferred Unit Distribution
                  Payment Date that is the subject of the Series B Default.
                  Failure of the holders of Series B Preferred Units to timely
                  give such notice shall terminate the right of the holders of
                  Series B Preferred Units under this Section 17.5(a)(ii) to
                  demand redemption with respect to the Series B Default to
                  which such notice relates, but shall not effect the rights of
                  the holders of Series B Preferred Units under this Section
                  17.5(a)(ii) for any subsequent Series B Default.

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                        (iii) Procedures for Redemption.

                              (A) Notice of redemption will be (x) faxed and (y)
                        mailed by the holders of Series B Preferred Units, by
                        certified mail, postage prepaid, to the Partnership so
                        that notice is received by the Partnership within the
                        periods set forth herein and in accordance with the
                        provisions hereof. Each such notice shall: (1) state the
                        aggregate number of Series B Preferred Units to be
                        redeemed and if fewer than all of the outstanding Series
                        B Preferred Units are to be redeemed, the number of
                        Series B Preferred Units to be redeemed held by such
                        holder, which number shall equal such holder's pro rata
                        share (based on the percentage of the aggregate number
                        of outstanding Series B Preferred Units the total number
                        of Series B Preferred Units held by such holder
                        represents) of the aggregate number of Series B
                        Preferred Units to be redeemed and (2) refer to the
                        specific subsection of this Section 17.5 pursuant to
                        which such redemption is being effected. Any such notice
                        shall be irrevocable.

                              (B) By 12:00 noon, New York City time, on the
                        redemption date, the Partnership will deposit
                        irrevocably in trust with Boston Equiserve, its transfer
                        agent (or any successor entity, provided such entity is
                        a third party, unrelated to the Company and the
                        Partnership) for the benefit of the Series B Preferred
                        Units being redeemed funds sufficient to pay the Series
                        B Redemption Price and will give irrevocable
                        instructions to such transfer agent and authority to pay
                        such Series B Redemption Price to the holders of the
                        Series B Preferred Units upon surrender of the Series B
                        Preferred Units by such holders at the place designated
                        by the Partnership. If the Series B Preferred Units are
                        evidenced by a certificate and if fewer than all Series
                        B Preferred Units evidenced by any certificate are being
                        redeemed, a new certificate shall be issued upon
                        surrender of the certificate evidencing all Series B
                        Preferred Units, evidencing the unredeemed Series B
                        Preferred Units without cost to the holder thereof. On
                        and after the date of redemption, distributions will
                        cease to accumulate on the Series B Preferred Units or
                        portions thereof called for redemption, unless the
                        Partnership defaults in the payment of the Series B
                        Redemption Price. If any date fixed for redemption of
                        Series B Preferred Units is not a Business Day, then
                        payment of the Series B Redemption Price payable on such
                        date will be made on the next succeeding day that is a
                        Business Day (and without any interest or other payment
                        in respect of any such delay) except that, if such
                        Business Day falls in the next calendar year, such
                        payment will be made on the immediately preceding
                        Business Day, in each case with the same force and
                        effect as if made on such date fixed for redemption. If
                        payment of the Series B Redemption Price is improperly
                        withheld or refused and not paid by the Partnership,
                        distributions on such Series B Preferred Units will
                        continue to accumulate from the original redemption date
                        to the date of payment, in which case the actual payment
                        date will be considered the date fixed for redemption
                        for purposes of calculating the Series B Redemption
                        Price.

                  (b) Series B-1 Preferred Units

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                        (i) Mandatory Redemption. Subject to the limitations in
                  this Section 17.5, during the ninety (90) day period
                  immediately following (x) each anniversary of the Series B-1
                  Issuance Date commencing with the fifth anniversary of the
                  Series B-1 Issuance Date or (y) the Partnership's receipt of
                  notice of Vern Slagh's death, the Series B-1 Preferred Partner
                  may require redemption of, and the Partnership shall redeem,
                  for cash, at the Series B-1 Redemption Price, all, but not
                  less than all, of the Series B-1 Preferred Partner's Series
                  B-1 Preferred Units upon not less than sixty (60) days' prior
                  written notice to the Partnership.

                        (ii) Optional Redemption. At any time after the
                  expiration of the Election Periods, as defined in (b)(i)
                  above, immediately following the eleventh anniversary of the
                  Series B-1 Issuance Date, the Partnership may redeem all
                  outstanding Series B-1 Preferred Units at the Series B-1
                  Redemption Price upon not less than fifteen (15) days' prior
                  written notice to the Series B-1 Preferred Partner.

                        (iii) Procedures for Redemption.

                              (A) Notice of redemption will be (x) faxed and (y)
                        mailed by the Series B-1 Preferred Partner, by certified
                        mail, postage prepaid, to the Partnership so that notice
                        is received by the Partnership within the periods set
                        forth herein and in accordance with the provisions
                        hereof. Any such notice shall be irrevocable.

                              (B) By 12:00 noon, New York City time, on the
                        redemption date, the Partnership will deposit
                        irrevocably in trust with Boston Equiserve, its transfer
                        agent (or any successor entity, provided such entity is
                        a third party, unrelated to the Company and the
                        Partnership) for the benefit of the Series B-1 Preferred
                        Partner funds sufficient to pay the Series B-1
                        Redemption Price and will give irrevocable instructions
                        to such transfer agent and authority to pay such Series
                        B-1 Redemption Price to the Series B-1 Preferred Partner
                        upon surrender of the Series B-1 Preferred Units by the
                        Series B-1 Preferred Partner at the place designated by
                        the Partnership. On and after the date of redemption,
                        distributions will cease to accumulate on the Series B-1
                        Preferred Units, unless the Partnership defaults in the
                        payment of the Series B-1 Redemption Price. If any date
                        fixed for redemption of Series B-1 Preferred Units is
                        not a Business Day, then payment of the Series B-1
                        Redemption Price payable on such date will be made on
                        the next succeeding day that is a Business Day (and
                        without any interest or other payment in respect of any
                        such delay) except that, if such Business Day falls in
                        the next calendar year, such payment will be made on the
                        immediately preceding Business Day, in each case with
                        the same force and effect as if made on such date fixed
                        for redemption. If payment of the Series B-1 Redemption
                        Price is improperly withheld or refused and not paid by
                        the Partnership, distributions on such Series B-1
                        Preferred Units will continue to accumulate from the
                        original redemption date to the date of payment, in
                        which case the actual payment date will be considered
                        the date fixed for redemption for purposes of
                        calculating the Series B-1 Redemption Price.

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                  (c) Limitations on Redemption. Any redemption pursuant to this
            Section 17.5 is subject to and limited by the provisions of Section
            16.3(c)(i) hereof.

            SECTION 17.6 VOTING RIGHTS. Holders of the Series B Cumulative
      Preferred Units will not have any voting rights or right to consent to any
      matter requiring the consent or approval of the Limited Partners.

            SECTION 17.7 TRANSFER RESTRICTIONS. The Series B Cumulative
      Preferred Units shall be subject to the provisions of SECTION 9 of the
      Agreement.

            SECTION 17.8 CONVERSION AND EXCHANGE RIGHTS.

            (a) General. The holders of Series B Preferred Units shall be
      entitled to convert Series B Preferred Units into Common OP Units or
      exchange Series B Preferred Units for shares of the General Partner's
      common stock, at their option, on the following terms and subject to the
      following conditions:

                  (i) On May 1, 2002, the holders of Series B Preferred Units
            may convert an aggregate of 10,000 Series B Preferred Units into
            22,727 Common OP Units or exchange an aggregate of 10,000 Series B
            Preferred Units for 22,727 shares of the General Partner's common
            stock, or any combination thereof at conversion or exchange rate of
            2.272727 Common OP Units or shares of the General Partner's common
            stock, as the case may be, for each Series B Preferred Unit (rounded
            to the lower whole number), at their option, provided the General
            Partner has received at least sixty (60) days prior written notice
            of such conversion or exchange, such notice to specify the number of
            Common OP Units and number of shares of the General Partner's common
            stock to which the Series B Preferred Units are to be converted or
            exchanged.

                  (ii) On each of May 1, 2003, May 1, 2004, May 1, 2005 and May
            1, 2006, the holders of Series B Preferred Units may convert all or
            any portion (but not less than 10,000) Series B Preferred Units to
            Common OP Units or exchange all or any portion (but not less than
            10,000) Series B Preferred Units for shares of the General Partner's
            common stock, at their option, at a conversion and exchange rate of
            2.272727 Common OP Units or shares of the General Partner's common
            stock, as the case may be, for each Series B Preferred Unit (rounded
            to the lower whole number), provided the General Partner has
            received at least sixty (60) days prior written notice of such
            conversion or exchange, such notice to specify the number of Common
            OP Units and number of shares of the General Partner's common stock
            to which the Series B Preferred Units are to be converted or
            exchanged.

            (b) Procedure for Conversion or Exchange.

                  (i) Any conversion or exchange shall be exercised pursuant to
            a notice of conversion or exchange (the "SERIES B
            CONVERSION/EXCHANGE NOTICE") delivered to the General Partner by the
            holder who is exercising such conversion or exchange right, by (A)
            fax and (B) by certified mail postage prepaid. The Series B
            Conversion/Exchange Notice and certificates, if any, representing
            such Series B Preferred Units to be converted or exchanged shall be
            delivered to the office of the General Partner maintained for such
            purpose. Currently, such office is:

                                       10
<PAGE>
                                 Sun Communities, Inc.
                                 Suite 145
                                 31700 Middlebelt Road
                                 Farmington Hills, Michigan 48334.

            Any conversion or exchange hereunder shall be effective as of the
            close of business on the conversion or exchange date. The holders of
            the converted or exchanged Series B Preferred Units shall be deemed
            to have surrendered the same to the Partnership or the General
            Partner, as the case may be, and the Partnership or the General
            Partner, as the case may be, shall be deemed to have issued Common
            OP Units or shares of common stock of the General Partner, as
            applicable, at the close of business on the conversion or exchange
            date.

            (c) Adjustment of Series B Conversion/Exchange Rate.

                  (i) The conversion/exchange rate is subject to adjustment upon
            subdivisions, stock splits, stock dividends, combinations and
            reclassification of the common stock of the General Partner.

                  (ii) In case the General Partner shall be a party to any
            transaction (including, without limitation, a merger, consolidation,
            statutory share exchange, tender offer for all or substantially all
            of the General Partner's capital stock or sale of all or
            substantially all of the General Partner's assets), in each case as
            a result of which the General Partner's common stock will be
            converted into the right to receive shares of capital stock, other
            securities or other property (including cash or any combination
            thereof), each Series B Preferred Unit will thereafter be
            convertible or exchangeable into the kind and amount of shares of
            capital stock and other securities and property receivable
            (including cash or any combination thereof) upon the consummation of
            such transaction by a holder of that number of shares of the General
            Partner's common stock or fraction thereof into which one Series B
            Preferred Unit was convertible or exchangeable immediately prior to
            such transaction

            (d) Limitations on Conversion and Exchange. Notwithstanding Section
      17.8(a):

                  (i) Upon tender of any Series B Preferred Units to the General
            Partner pursuant to that Section, the General Partner may issue cash
            in lieu of stock to the extent necessary to prevent the recipient
            from violating the Ownership Limitations of Section 2 of Article VII
            of the Charter, or corresponding provisions of any amendment or
            restatement thereof; and

                  (ii) A holder of Series B Preferred Units will not have the
            right to exchange Series B Preferred Units for the General Partner's
            common stock if (1) in the opinion of counsel for the General
            Partner, the General Partner would no longer qualify or its status
            would be seriously compromised as a real estate investment trust
            under the Internal Revenue Code as a result of such exchange; or (2)
            such exchange would, in the opinion of counsel for the General
            Partner, constitute or be likely to constitute a violation of
            applicable securities laws. In the event of either such occurrence,
            the General Partner shall purchase such holder's Series B Preferred
            Units for cash at a purchase price of $100 per Series B Preferred
            Unit.

                                       11
<PAGE>
            (e) Reservation of Common Stock. The General Partner shall at all
      times reserve and keep available a sufficient number of authorized but
      unissued shares of common stock to permit the exchange of all of the
      outstanding Series B Preferred Units pursuant to this Section 17.8.

            (f) Payment of Series B Priority Return. On the Series B Cumulative
      Preferred Unit Distribution Payment Date next following a conversion or
      exchange date, holders of Series B Preferred Units converted or exchanged
      on such date shall be entitled to Series B Priority Return in an amount
      equal to a prorated portion of the Series B Priority Return based on the
      number of days elapsed from the prior Series B Cumulative Preferred Unit
      Distribution Payment Date through, but not including, the conversion or
      exchange date.

            SECTION 17.9 NO SINKING FUND. No sinking fund shall be established
      for the retirement or redemption of Series B Cumulative Preferred Units.

      8. Governing Law. This Amendment shall be interpreted and enforced
according to the laws of the State of Michigan.

      9. Full Force and Effect. Except as amended by the provisions hereof, the
Agreement, as previously amended, shall remain in full force and effect in
accordance with its terms and is hereby ratified, confirmed and reaffirmed by
the undersigned for all purposes and in all respects.

      10. Successors/Assigns. This Amendment shall be binding upon and shall
inure to the benefit of the parties hereto, their respective legal
representatives, successors and assigns.

      11. Counterparts. This Amendment may be executed in counterparts, all of
which together shall constitute one agreement binding on all the parties hereto,
notwithstanding that all such parties are not signatories to the original or the
same counterpart.

                        (SIGNATURES APPEAR ON NEXT PAGE)

                                       12
<PAGE>
         IN WITNESS WHEREOF, the undersigned has executed this Amendment as of
the day and year first above written.

                                   GENERAL PARTNER

                                   SUN COMMUNITIES, INC.. a Maryland corporation

                                   By: /s/ Jonathan M. Colman
                                      --------------------------------------
                                        Name: Jonathan M. Colman
                                        Title: Senior Vice President -
                                               Acquisitions

                                   NEW LIMITED PARTNER

                                   RIVER HAVEN VILLAGE, INC., a Michigan
                                   corporation

                                   By: /s/ Vern Slagh
                                      --------------------------------------
                                        Vern Slagh, President

                                       13<PAGE>
                                                                   EXHIBIT 10.37

                        ONE HUNDRED FORTY-FIFTH AMENDMENT
                                     TO THE
            SECOND AMENDED AND RESTATED LIMITED PARTNERSHIP AGREEMENT
                                       OF
                  SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP

      THIS ONE HUNDRED FORTY-FIFTH AMENDMENT TO THE SECOND AMENDED AND RESTATED
LIMITED PARTNERSHIP AGREEMENT OF SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP
(this "AMENDMENT") is made and entered into as of January 31, 2002, by and
between SUN COMMUNITIES, INC., a Maryland corporation (the "GENERAL PARTNER"),
as the general partner of SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP, a
Michigan limited partnership (the "PARTNERSHIP"), and BAY AREA LIMITED
PARTNERSHIP, a Michigan limited partnership (the "SERIES B-2 PREFERRED
PARTNER").

                                    RECITALS

      A. The Series B-2 Preferred Partner and the Partnership are parties to
that certain Contribution Agreement, of even date herewith (the "Contribution
Agreement"), pursuant to which the Series B-2 Preferred Partner has agreed to
contribute to the Partnership the Transferred Membership Interests (as defined
in the Contribution Agreement) in consideration for the issuance by the
Partnership of Series B-2 Preferred Units (as hereinafter defined).

      B. The signatories hereto desire to amend that certain Second Amended and
Restated Limited Partnership Agreement of Sun Communities Operating Limited
Partnership, dated as of April 30, 1996, as amended by those certain amendments
numbered one through one hundred forty-four (collectively, as amended, the
"Agreement") as set forth herein; any capitalized term not defined herein shall
have the respective meaning ascribed to it in the Agreement.

      C. Section 11 of the Agreement authorizes the General Partner, as the
holder of more than fifty percent (50%) of the OP Units, to amend the Agreement.

      NOW, THEREFORE, in consideration of the foregoing, of the mutual promises
set forth herein, and of other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound, agree to continue the Partnership and amend the Agreement as
follows:

      1. Admission of New Partners. As of the date hereof, the Series B-2
Preferred Partner has contributed the Transferred Membership Interests, with a
net agreed upon value of [$15,000,000], to the Partnership in exchange for the
assumption of the Comerica Debt and the Morse Debt (as such terms are defined in
the Contribution Agreement) and the issuance to the Series B-2 Preferred Partner
of 100,000 Series B-2 Preferred Units. The Series B-2 Preferred Units issued to
the Series B-2 Preferred Partner have been duly issued and fully paid. The
Series B-2 Preferred Partner is hereby admitted to the Partnership as a new
Limited Partner, and by execution of this Amendment the Series B-2 Preferred
Partner has agreed to be bound by all of the terms and conditions of the
Agreement, as amended hereby, and hereby acknowledges receipt of a copy of the
Agreement. Exhibit A of the Agreement is hereby deleted in its entirety and is
replaced with EXHIBIT A to this Amendment.

      2. Sections 3.1 and 3.2. Sections 3.1 and 3.2 of the Agreement are hereby
deleted in their entirety and replaced with the following:
<PAGE>

      "3.1 OP UNITS

            The Partners' interests in the Partnership are expressed in terms of
      OP Units and each Partner has been issued OP Units corresponding to the
      agreed value of its capital contribution. OP Units consist of Common OP
      Units, Preferred OP Units, Series A Preferred Units, Series B Preferred
      Units, Series B-1 Preferred Units and Series B-2 Preferred Units.

      3.2 COMMON OP UNITS

            The holders of the Common OP Units shall be entitled to receive
      distributions in accordance with Section 4.3, after payment of all accrued
      (i) Preferred Dividends, (ii) Series A Priority Return, (iii) Series B
      Priority Return, (iv) Series B-1 Priority Return and (v) Series B-2
      Priority Return. No distribution shall be made in respect of Common OP
      Units while any accrued (i) Preferred Dividends, (ii) Series A Priority
      Return, (iii) Series B Priority Return, (iv) Series B-1 Priority Return or
      (v) Series B-2 Priority Return remains unpaid unless all such unpaid
      amounts are paid simultaneously with such distribution."

      3. Section 4.2 (a)(v) of the Agreement is hereby deleted in its entirety
and replaced with the following:

            "(v) fifth, with respect to OP Units other than Series A Preferred
      Units, pro rata in proportion to the number of OP Units other than Series
      A Preferred Units, held by each such Partner as of the last day of the
      period for which such allocation is being made; provided, however, that
      the profits allocated to any Preferred OP Units, Series B Preferred Units,
      Series B-1 Preferred Units and Series B-2 Preferred Units pursuant to this
      Section 4.2(b)(v) for any calendar year shall not exceed the amount of
      Preferred Dividends, Series B Priority Return, Series B-1 Priority Return
      and Series B-2 Priority Return, respectively, thereon for that calendar
      year, and any such excess profits remaining after the application of such
      limitation shall be allocated to the holders of the Common OP Units, pro
      rata."

      4. Section 8.2(a) of the Agreement is hereby deleted in its entirety and
replaced with the following:

      "8.2 LIQUIDATING DISTRIBUTIONS; RESTORATION OF CAPITAL ACCOUNT DEFICITS

            Upon the liquidation of the Partnership or any Partner's interest in
      the Partnership, within the meaning of the Allocation Regulations:

            (a) The capital accounts of the holders of the OP Units shall be
      adjusted to reflect the manner in which any unrealized income, gain, loss
      and deduction inherent in the Partnership's property, which has not
      previously been reflected in the Partners' capital accounts, would be
      allocated among the Partners if there were a taxable disposition of such
      property at fair market value on the date of distribution. Any resulting
      increase in the Partners' capital accounts shall be allocated (i) first to
      the holders of the Preferred OP Units and Series A Preferred Units in
      proportions and amounts sufficient to bring their respective capital
      account balances up to the amount of the Issue Prices of their respective
      Preferred OP Units and Series A Preferred Units plus accrued and unpaid
      Preferred Dividends or Series A Priority Return, as the case may be,
      thereon, (ii) second to the holders of the Series B Cumulative Preferred
      Units in proportions and amounts sufficient to bring their respective
      capital account balances up to the amount of the Issue Price of the Series
      B Cumulative Preferred Units plus accrued and unpaid Series B Priority
      Return, Series B-1 Priority Return and Series B-2 Priority Return, as
      applicable, thereon, and (iii)

                                       2
<PAGE>

      third (if any) to the Common OP Units. Any resulting decrease in the
      Partners' capital accounts shall first be allocated (i) first to the
      holders of the Common OP Units in proportions and amounts sufficient to
      reduce their respective capital account balances to zero, (ii) second to
      the holders of Series B Cumulative Preferred Units in proportions and
      amounts sufficient to reduce their respective capital account balances to
      zero, (iii) third to the holders of the Preferred OP Units and Series A
      Preferred Units in proportions and amounts sufficient to reduce their
      respective capital account balances to zero, and (iv) (if any) to the
      General Partner. Liquidating distributions shall be made in accordance
      with the positive capital account balances of the Partners, after giving
      effect to such adjustment and other capital account adjustments for the
      current year, as provided in the Allocation Regulations.

      5. Section 14. Section 14 of the Agreement is hereby amended as follows:

            (a) The second sentence of the definition of "OP UNITS" is hereby
      deleted in its entirety and replaced with the following: "OP Units consist
      of Common OP Units, Preferred OP Units, Series A Preferred Units, Series B
      Preferred Units, Series B-1 Preferred Units and Series B-2 Preferred
      Units."

            (b) The following new definitions are inserted in Section 14
      (Definitions) so as to preserve alphabetical order, and the definition of
      "Series B Preferred Unit Distribution Payment Date" and "Series B Default"
      shall be deleted:

                  "CHANGE IN CONTROL" shall have the meaning set forth therefor
            in Section 17.5(c) hereof.

                  "SERIES B-2 ISSUANCE DATE" shall mean January 31, 2002.

                  "SERIES B-2 PREFERRED PARTNER" means Bay Area Limited
            Partnership, a Michigan limited partnership, and its successors and
            permitted assigns.

                  "SERIES B-2 PREFERRED UNITS" shall have the meaning set forth
            therefor in Section 17.2 hereof.

                  "SERIES B-2 PRIORITY RETURN" shall have the meaning set forth
            therefor in Section 17.1 hereof.

                  "SERIES B-2 REDEMPTION PRICE" shall mean $45 per Series B-2
            Preferred Unit redeemed.

      6. Section 17 of the Agreement is hereby deleted in its entirety and
replaced with the following:

      "17. SERIES B CUMULATIVE PREFERRED UNITS.

            SECTION 17.1 DEFINITIONS. The term "SERIES B CUMULATIVE PREFERRED
      UNITS" shall mean the Series B Preferred Units, the Series B-1 Preferred
      Units, and the Series B-2 Preferred Units. The term "SERIES B PARITY
      PREFERRED UNITS" shall mean any class or series of OP Units of the
      Partnership now or hereafter authorized, issued or outstanding and
      expressly designated by the Partnership to rank on parity with the Series
      B Preferred Units, Series B-1 Preferred Units, and Series B-2 Preferred
      Units with respect to distributions and rights upon voluntary or
      involuntary liquidation, winding-up or dissolution of the Partnership. The
      term "SERIES B

                                       3
<PAGE>

      PRIORITY RETURN" shall mean an amount equal to (i) 7.0% per annum for the
      First 24 Month Period, (ii) 7.5% per annum for the Second 24 Month Period,
      (iii) 8.0% per annum for the First 12 Month Period, and (iv) 9.0% per
      annum for the Second 12 Month Period (determined on the basis of a 365 day
      year), of the stated amount of $100.00 per Series B Preferred Unit
      multiplied by the number of outstanding Series B Preferred Units,
      cumulative to the extent not distributed for any given distribution period
      pursuant to Section 4.3 hereof. The term "SERIES B-1 PRIORITY RETURN"
      shall mean an amount equal to (i) 6.85% per annum commencing on and
      including the Series B-1 Issuance Date and ending on and including October
      15, 2003, (ii) 7.2% per annum commencing on and including October 16, 2003
      and ending on and including April 15, 2006, (iii) 7.6% per annum
      commencing on and including April 16, 2006 and ending on and including
      April 15, 2008, (iv) 8.36% per annum commencing on and including April 16,
      2008 and ending on and including April 15, 2010, and (v) 9.19% per annum
      thereafter (determined on the basis of a 365 day year), of the stated
      amount of $100.00 per Series B-1 Preferred Unit multiplied by the number
      of outstanding Series B-1 Preferred Units, cumulative to the extent not
      distributed for any given distribution period pursuant to Section 4.3
      hereof. The term "SERIES B-2 PRIORITY RETURN" shall mean an amount equal
      to (i) 6.0% per annum commencing on and including the Series B-2 Issuance
      Date and ending on and including January 31, 2007, and (ii) 7.0% per annum
      thereafter (determined on the basis of a 365 day year), of the stated
      amount of $45.00 per Series B-2 Preferred Unit multiplied by the number of
      outstanding Series B-2 Preferred Units, cumulative to the extent not
      distributed for any given distribution period pursuant to Section 4.3
      hereof.

            SECTION 17.2 DESIGNATION AND NUMBER. A series of OP Units in the
      Partnership designated as the "Series B Cumulative Preferred Units" is
      hereby established. Of such Series B Cumulative Preferred Units there
      shall be designated Series B Preferred Units ("SERIES B PREFERRED UNITS"),
      Series B-1 Preferred Units ("SERIES B-1 PREFERRED UNITS") and Series B-2
      Preferred Units ("SERIES B-2 PREFERRED UNITS"). The number of Series B
      Preferred Units shall be 35,637, the number of Series B-1 Preferred Units
      shall be 46,117, and the number of Series B-2 Preferred Units shall be
      100,000.

            SECTION 17.3 DISTRIBUTIONS.

                  (a) Payment of Distributions.

                        (i) Subject to the rights of holders of Series A
                  Preferred Units, Parity Preferred Units, Preferred OP Units
                  and Series B Parity Preferred Units as to the payment of
                  distributions pursuant to Sections 4.3, 8.2 and 16.3 of the
                  Agreement, holders of Series B Preferred Units, Series B-1
                  Preferred Units and Series B-2 Preferred Units shall be
                  entitled to receive, when, as and if declared by the
                  Partnership acting through the General Partner, out of the
                  Partnership's available cash, the Series B Priority Return,
                  Series B-1 Priority Return, and Series B-2 Priority Return,
                  respectively.

                        (ii) All distributions shall be cumulative, shall accrue
                  from the original date of issuance and will be payable (i)
                  quarterly (such quarterly periods for purposes of payment and
                  accrual will be the quarterly periods ending on the dates
                  specified in this sentence) in arrears, on March 31, June 30,
                  September 30 and December 31 of each year, and (ii) in the
                  event of a redemption of Series B Cumulative Preferred Units,
                  on the redemption date (each a "SERIES B CUMULATIVE PREFERRED
                  UNIT DISTRIBUTION PAYMENT DATE"). The amount of the
                  distribution payable for any period will be computed on the
                  basis of a 365-day year and for any period shorter than a full
                  quarterly period for which distributions

                                       4
<PAGE>

                  are computed, the amount of the distribution payable will be
                  computed based on the ratio of the actual number of days
                  elapsed in such period to the actual number of days in such
                  quarterly period. If any date on which distributions are to be
                  made on the Series B Cumulative Preferred Units is not a
                  Business Day (as defined in Section 14), then payment of the
                  distribution to be made on such date will be made on the next
                  succeeding day that is a Business Day (and without any
                  interest or other payment in respect of any such delay) except
                  that, if such Business Day is in the next succeeding calendar
                  year, such payment shall be made on the immediately preceding
                  Business Day, in each case with the same force and effect as
                  if made on such date. Distributions on the Series B Cumulative
                  Preferred Units will be made to the holders of record of the
                  Series B Cumulative Preferred Units on the relevant record
                  dates to be fixed by the Partnership acting through the
                  General Partner, which record dates shall in no event exceed
                  fifteen (15) Business Days prior to the relevant Series B
                  Cumulative Preferred Unit Distribution Payment Date.

                  (b) Distributions Cumulative. Distributions on the Series B
            Cumulative Preferred Units will accrue whether or not the terms and
            provisions of any agreement of the Partnership, including any
            agreement relating to its indebtedness at any time prohibit the
            declaration, setting aside for payment or current payment of
            distributions, whether or not the Partnership has earnings, whether
            or not there are funds legally available for the payment of such of
            such distributions and whether or not such distributions are
            authorized. Accrued but unpaid distributions on the Series B
            Cumulative Preferred Units will accumulate as of the Series B
            Cumulative Preferred Unit Distribution Payment Date on which they
            first become payable. Distributions on account of arrears for any
            past distribution periods may be declared and paid at any time,
            without reference to a regular Series B Cumulative Preferred Unit
            Distribution Payment Date to holders of record of the Series B
            Cumulative Preferred Units on the record date fixed by the
            Partnership acting through the General Partner which date shall not
            exceed fifteen (15) Business Days prior to the payment date.
            Accumulated and unpaid distributions will not bear interest.

                  (c) Priority as to Distributions.

                        (i) So long as any Series B Cumulative Preferred Units
                  are outstanding, no distribution of cash or other property
                  shall be authorized, declared, paid or set apart for payment
                  on or with respect to any class or series of OP Units of the
                  Partnership ranking junior as to the payment of distributions
                  or rights upon a voluntary or involuntary liquidation,
                  dissolution or winding-up of the Partnership to the Series B
                  Cumulative Preferred Units (collectively, "SERIES B JUNIOR
                  UNITS"), nor shall any cash or other property be set aside for
                  or applied to the purchase, redemption or other acquisition
                  for consideration of any Series B Cumulative Preferred Units,
                  any Series B Parity Preferred Units or any Series B Junior
                  Units, unless, in each case, all distributions accumulated on
                  all Series B Cumulative Preferred Units and all classes and
                  series of outstanding Series B Parity Preferred Units have
                  been paid in full. The foregoing sentence will not prohibit
                  (a) distributions payable solely in OP Units ranking junior to
                  the Series B Cumulative Preferred Units as to the payment of
                  distributions and rights upon a voluntary or involuntary
                  liquidation, dissolution or winding-up of the Partnership, (b)
                  the conversion of Series B Junior Units or Series B Parity
                  Preferred Units into OP Units of the Partnership ranking
                  junior to the Series B Cumulative Preferred Units as to
                  distributions and rights upon a voluntary or

                                       5
<PAGE>

                  involuntary liquidation, dissolution or winding-up of the
                  Partnership, or (c) the redemption of OP Units corresponding
                  to any Junior Stock (as defined in the Series A Articles
                  Supplementary) to be purchased by the General Partner pursuant
                  to Article VII of the Charter to preserve the General
                  Partner's status as a real estate investment trust, provided
                  that such redemption shall be upon the same terms as the
                  corresponding purchase pursuant to Article VII of the Charter.

                        (ii) So long as distributions have not been paid in full
                  (or a sum sufficient for such full payment is not irrevocably
                  deposited in trust for immediate payment) upon the Series B
                  Cumulative Preferred Units, all distributions authorized and
                  declared on the Series B Cumulative Preferred Units and all
                  classes or series of outstanding Series B Parity Preferred
                  Units shall be authorized and declared so that the amount of
                  distributions authorized and declared per Series B Cumulative
                  Preferred Unit and such other classes or series of Series B
                  Parity Preferred Units shall in all cases bear to each other
                  the same ratio that accrued distributions per Series B
                  Cumulative Preferred Unit and such other classes or series of
                  Series B Parity Preferred Units (which shall not include any
                  accumulation in respect of unpaid distributions for prior
                  distribution periods if such class or series of Series B
                  Parity Preferred Units do not have cumulative distribution
                  rights) bear to each other.

                        (iii) The Series B Cumulative Preferred Units and any
                  Series B Parity Preferred Units shall be deemed to be "Junior
                  Units" as defined in Section 16.3(c) hereof, and so long as
                  any Series A Preferred Units or Parity Preferred Units are
                  outstanding, no distribution of cash or other property shall
                  be authorized, declared, paid or set apart for payment on or
                  with respect to the Series B Cumulative Preferred Units or any
                  Series B Parity Preferred Units, nor shall any cash or other
                  property be set aside for or applied to the purchase,
                  redemption or other acquisition for consideration of any
                  Series B Cumulative Preferred Units or Series B Parity
                  Preferred Units unless, in each case, all distributions
                  accumulated on all Series A Preferred Units and all classes
                  and series of outstanding Parity Preferred Units have been
                  paid in full.

                  (d) Distributions on OP Units held by General Partner.
            Notwithstanding anything to the contrary herein, distributions on OP
            Units held by the General Partner may be made, without preserving
            the priority of distributions described in Section 17.3(c)(i) and
            (ii), but only to the extent such distributions are required to
            preserve the real estate investment trust status of the General
            Partner.

                  (e) No Further Rights. Holders of Series B Cumulative
            Preferred Units shall not be entitled to any distributions, whether
            payable in cash, other property or otherwise, in excess of the full
            cumulative distributions described herein.

            SECTION 17.4 LIQUIDATION PROCEEDS.

                  (a) Notice. Written notice of any voluntary or involuntary
            liquidation, dissolution or winding-up of the Partnership, stating
            the payment date or dates when, and the place or places where, the
            amounts distributable in such circumstances shall be payable, shall
            be given by (i) fax and (ii) by first class mail, postage pre-paid,
            not less than thirty (30) and not more than sixty (60) days prior to
            the payment date stated therein, to each record holder of the Series
            B Cumulative Preferred Units at the respective

                                       6
<PAGE>

            addresses of such holders as the same shall appear on the transfer
            records of the Partnership.

                  (b) No Further Rights. After payment of the full amount of the
            liquidating distributions to which they are entitled pursuant to
            Section 8.2 hereof, the holders of Series B Cumulative Preferred
            Units will have no right or claim to any of the remaining assets of
            the Partnership.

                  (c) Consolidation, Merger or Certain Other Transactions. The
            voluntary sale, conveyance, lease, exchange or transfer (for cash,
            shares of stock, securities or other consideration) of all or
            substantially all of the property or assets of the General Partner
            to, or the consolidation or merger or other business combination of
            the Partnership with or into, any corporation, trust, partnership,
            limited liability company or other entity (or of any corporation,
            trust, partnership, limited liability company or other entity with
            or into the Partnership) shall not be deemed to constitute a
            liquidation, dissolution or winding-up of the Partnership.

            SECTION 17.5 REDEMPTION.

                  (a) Series B Preferred

                        (i) Mandatory Redemption. Subject to the limitations in
                  this Section 17.5, the holders of Series B Preferred Units may
                  request redemption of, and the Partnership shall redeem, for
                  cash, Series B Preferred Units on the following terms and
                  subject to the following conditions:

                              (A) On May 1, 2003 the holders of Series B
                        Preferred Units may require that the Partnership redeem
                        an aggregate of 10,000 Series B Preferred Units upon not
                        less than sixty (60) days prior written notice, at the
                        Series B Redemption Price.

                              (B) On May 1, 2004 and May 1, 2005 the holders of
                        Series B Preferred Units may require that the
                        Partnership redeem all outstanding Series B Preferred
                        Units upon not less than sixty (60) days prior written
                        notice at the Series B Redemption Price.

                              (C) On May 1, 2006, the Partnership shall redeem
                        all outstanding Series B Preferred Units at the Series B
                        Redemption Price.

                        (ii) Redemption in the Event of a Series B Default. The
                  Partnership shall redeem, for cash, all outstanding Series B
                  Preferred Units at the Series B Redemption Price in the event
                  the Partnership fails to declare and pay on any Series B
                  Cumulative Preferred Unit Distribution Payment Date the Series
                  B Priority Return for any reason including the failure to
                  declare a distribution of the Series B Priority Return (a
                  "SERIES B DEFAULT"). Such redemption shall occur fifteen (15)
                  days after written demand of the holders of Series B Preferred
                  Units is received by the Partnership, provided such notice is
                  received by the Partnership no later than thirty (30) days
                  after the Series B Cumulative Preferred Unit Distribution
                  Payment Date that is the subject of the Series B Default.
                  Failure of the holders of Series B Preferred Units to timely
                  give such notice shall terminate the right of the holders of
                  Series B Preferred Units under this Section

                                       7
<PAGE>

                  17.5(a)(ii) to demand redemption with respect to the Series B
                  Default to which such notice relates, but shall not effect the
                  rights of the holders of Series B Preferred Units under this
                  Section 17.5(a)(ii) for any subsequent Series B Default.

                        (iii) Procedures for Redemption.

                              (A) Notice of redemption will be (x) faxed and (y)
                        mailed by the holders of Series B Preferred Units, by
                        certified mail, postage prepaid, to the Partnership so
                        that notice is received by the Partnership within the
                        periods set forth herein and in accordance with the
                        provisions hereof. Each such notice shall: (1) state the
                        aggregate number of Series B Preferred Units to be
                        redeemed and if fewer than all of the outstanding Series
                        B Preferred Units are to be redeemed, the number of
                        Series B Preferred Units to be redeemed held by such
                        holder, which number shall equal such holder's pro rata
                        share (based on the percentage of the aggregate number
                        of outstanding Series B Preferred Units the total number
                        of Series B Preferred Units held by such holder
                        represents) of the aggregate number of Series B
                        Preferred Units to be redeemed and (2) refer to the
                        specific subsection of this Section 17.5 pursuant to
                        which such redemption is being effected. Any such notice
                        shall be irrevocable.

                              (B) By 12:00 noon, New York City time, on the
                        redemption date, the Partnership will deposit
                        irrevocably in trust with Boston Equiserve, its transfer
                        agent (or any successor entity, provided such entity is
                        a third party, unrelated to the Company and the
                        Partnership) for the benefit of the Series B Preferred
                        Units being redeemed funds sufficient to pay the Series
                        B Redemption Price and will give irrevocable
                        instructions to such transfer agent and authority to pay
                        such Series B Redemption Price to the holders of the
                        Series B Preferred Units upon surrender of the Series B
                        Preferred Units by such holders at the place designated
                        by the Partnership. If the Series B Preferred Units are
                        evidenced by a certificate and if fewer than all Series
                        B Preferred Units evidenced by any certificate are being
                        redeemed, a new certificate shall be issued upon
                        surrender of the certificate evidencing all Series B
                        Preferred Units, evidencing the unredeemed Series B
                        Preferred Units without cost to the holder thereof. On
                        and after the date of redemption, distributions will
                        cease to accumulate on the Series B Preferred Units or
                        portions thereof called for redemption, unless the
                        Partnership defaults in the payment of the Series B
                        Redemption Price. If any date fixed for redemption of
                        Series B Preferred Units is not a Business Day, then
                        payment of the Series B Redemption Price payable on such
                        date will be made on the next succeeding day that is a
                        Business Day (and without any interest or other payment
                        in respect of any such delay) except that, if such
                        Business Day falls in the next calendar year, such
                        payment will be made on the immediately preceding
                        Business Day, in each case with the same force and
                        effect as if made on such date fixed for redemption. If
                        payment of the Series B Redemption Price is improperly
                        withheld or refused and not paid by the Partnership,
                        distributions on such Series B Preferred Units will
                        continue to accumulate from the original redemption date
                        to the date of payment, in which case the actual payment
                        date will

                                       8
<PAGE>

                        be considered the date fixed for redemption for purposes
                        of calculating the Series B Redemption Price.

                  (b) Series B-1 Preferred Units

                        (i) Mandatory Redemption. Subject to the limitations in
                  this Section 17.5, during the ninety (90) day period
                  immediately following (x) each anniversary of the Series B-1
                  Issuance Date commencing with the fifth anniversary of the
                  Series B-1 Issuance Date or (y) the Partnership's receipt of
                  notice of Vern Slagh's death, the Series B-1 Preferred Partner
                  may require redemption of, and the Partnership shall redeem,
                  for cash, at the Series B-1 Redemption Price, all, but not
                  less than all, of the Series B-1 Preferred Partner's Series
                  B-1 Preferred Units upon not less than sixty (60) days' prior
                  written notice to the Partnership.

                        (ii) Optional Redemption. At any time after the
                  expiration of the Election Periods, as defined in (b)(i)
                  above, immediately following the eleventh anniversary of the
                  Series B-1 Issuance Date, the Partnership may redeem all
                  outstanding Series B-1 Preferred Units at the Series B-1
                  Redemption Price upon not less than fifteen (15) days' prior
                  written notice to the Series B-1 Preferred Partner.

                        (iii) Procedures for Redemption.

                              (A) Notice of redemption will be (x) faxed and (y)
                        mailed by the Series B-1 Preferred Partner, by certified
                        mail, postage prepaid, to the Partnership so that notice
                        is received by the Partnership within the periods set
                        forth herein and in accordance with the provisions
                        hereof. Any such notice shall be irrevocable.

                              (B) By 12:00 noon, New York City time, on the
                        redemption date, the Partnership will deposit
                        irrevocably in trust with Boston Equiserve, its transfer
                        agent (or any successor entity, provided such entity is
                        a third party, unrelated to the Company and the
                        Partnership) for the benefit of the Series B-1 Preferred
                        Partner funds sufficient to pay the Series B-1
                        Redemption Price and will give irrevocable instructions
                        to such transfer agent and authority to pay such Series
                        B-1 Redemption Price to the Series B-1 Preferred Partner
                        upon surrender of the Series B-1 Preferred Units by the
                        Series B-1 Preferred Partner at the place designated by
                        the Partnership. On and after the date of redemption,
                        distributions will cease to accumulate on the Series B-1
                        Preferred Units, unless the Partnership defaults in the
                        payment of the Series B-1 Redemption Price. If any date
                        fixed for redemption of Series B-1 Preferred Units is
                        not a Business Day, then payment of the Series B-1
                        Redemption Price payable on such date will be made on
                        the next succeeding day that is a Business Day (and
                        without any interest or other payment in respect of any
                        such delay) except that, if such Business Day falls in
                        the next calendar year, such payment will be made on the
                        immediately preceding Business Day, in each case with
                        the same force and effect as if made on such date fixed
                        for redemption. If payment of the Series B-1 Redemption
                        Price is improperly withheld or refused and

                                       9
<PAGE>

                        not paid by the Partnership, distributions on such
                        Series B-1 Preferred Units will continue to accumulate
                        from the original redemption date to the date of
                        payment, in which case the actual payment date will be
                        considered the date fixed for redemption for purposes of
                        calculating the Series B-1 Redemption Price.

                  (c) Series B-2 Preferred Units

                        (i) Mandatory Redemption. Subject to the limitations in
                  this Section 17.5, during the ninety (90) day period
                  immediately following (x) the fifth (5th) anniversary of the
                  Series B-2 Issuance Date, or (y) the death of James A. Morse,
                  or (z) the occurrence of a Change of Control (as defined
                  below), the Series B-2 Preferred Partner may require
                  redemption of, and the Partnership shall redeem, for cash, at
                  the Series B-2 Redemption Price plus all accrued but unpaid
                  amounts of Series B-2 Priority Return, all, but not less than
                  all, of the Series B-2 Preferred Partner's Series B-2
                  Preferred Units upon not less than thirty (30) days' prior
                  written notice to the Partnership. Notwithstanding the
                  foregoing, however, the Series B-2 Preferred Partner shall
                  have no right to put the Series B-2 Preferred Units to the
                  Partnership under clauses (y) or (z) of this Section 17.5(c)
                  prior to the fifth (5th) anniversary of the Series B-2
                  Issuance Date. For purposes of this Section 17.5, the term
                  "CHANGE OF CONTROL" means a sale of all or substantially all
                  of the Partnership's assets, or any merger or consolidation of
                  the Partnership with or into another entity other than a
                  merger or consolidation in which the holders of more than
                  fifty-percent (50%) of the voting securities of the
                  Partnership outstanding immediately prior to such transaction
                  continue to hold (either by the voting securities remaining
                  outstanding or by their being converted into voting securities
                  of the surviving entity) more than fifty percent (50%) of the
                  total voting power represented by the voting securities of the
                  Partnership, or such surviving entity, outstanding immediately
                  after such transaction.

                        (ii) Procedures for Redemption.

                              (A) Notice of redemption will be (x) faxed and (y)
                        mailed by the Series B-2 Preferred Partner, by certified
                        mail, postage prepaid, to the Partnership so that notice
                        is received by the Partnership within the periods set
                        forth herein and in accordance with the provisions
                        hereof. Any such notice shall be irrevocable.

                              (B) By 12:00 noon, New York City time, on the
                        redemption date, the Partnership will deposit
                        irrevocably in trust with Boston Equiserve, its transfer
                        agent (or any successor entity, provided such entity is
                        a third party, unrelated to the Company and the
                        Partnership) for the benefit of the Series B-2 Preferred
                        Partner funds sufficient to pay the Series B-2
                        Redemption Price and will give irrevocable instructions
                        to such transfer agent and authority to pay such Series
                        B-2 Redemption Price to the Series B-2 Preferred Partner
                        upon surrender of the Series B-2 Preferred Units by the
                        Series B-2 Preferred Partner at the place designated by
                        the Partnership. On and after the date of redemption,
                        distributions will cease to accumulate on the Series B-2
                        Preferred Units, unless the Partnership defaults in the
                        payment of the Series B-2 Redemption Price. If any date
                        fixed for redemption of Series B-2

                                       10
<PAGE>

                        Preferred Units is not a Business Day, then payment of
                        the Series B-2 Redemption Price payable on such date
                        will be made on the next succeeding day that is a
                        Business Day (and without any interest or other payment
                        in respect of any such delay) except that, if such
                        Business Day falls in the next calendar year, such
                        payment will be made on the immediately preceding
                        Business Day, in each case with the same force and
                        effect as if made on such date fixed for redemption. If
                        payment of the Series B-2 Redemption Price is improperly
                        withheld or refused and not paid by the Partnership,
                        distributions on such Series B-2 Preferred Units will
                        continue to accumulate from the original redemption date
                        to the date of payment, in which case the actual payment
                        date will be considered the date fixed for redemption
                        for purposes of calculating the Series B-2 Redemption
                        Price.

                  (d) Limitations on Redemption. Any redemption pursuant to this
            Section 17.5 is subject to and limited by the provisions of Section
            16.3(c)(i) hereof.

            SECTION 17.6 VOTING RIGHTS. Holders of the Series B Cumulative
      Preferred Units will not have any voting rights or right to consent to any
      matter requiring the consent or approval of the Limited Partners.

            SECTION 17.7 TRANSFER RESTRICTIONS. The Series B Cumulative
      Preferred Units shall be subject to the provisions of Section 9 of the
      Agreement.

            SECTION 17.8 CONVERSION AND EXCHANGE RIGHTS.

            (a) Series B Preferred Units. The holders of Series B Preferred
      Units shall be entitled to convert Series B Preferred Units into Common OP
      Units or exchange Series B Preferred Units for shares of the General
      Partner's common stock, at their option, on the following terms and
      subject to the following conditions:

                  (i) On May 1, 2002, the holders of Series B Preferred Units
            may convert an aggregate of 10,000 Series B Preferred Units into
            22,727 Common OP Units or exchange an aggregate of 10,000 Series B
            Preferred Units for 22,727 shares of the General Partner's common
            stock, or any combination thereof at conversion or exchange rate of
            2.272727 Common OP Units or shares of the General Partner's common
            stock, as the case may be, for each Series B Preferred Unit (rounded
            to the lower whole number), at their option, provided the General
            Partner has received at least sixty (60) days prior written notice
            of such conversion or exchange, such notice to specify the number of
            Common OP Units and number of shares of the General Partner's common
            stock to which the Series B Preferred Units are to be converted or
            exchanged.

                  (ii) On each of May 1, 2003, May 1, 2004, May 1, 2005 and May
            1, 2006, the holders of Series B Preferred Units may convert all or
            any portion (but not less than 10,000) Series B Preferred Units to
            Common OP Units or exchange all or any portion (but not less than
            10,000) Series B Preferred Units for shares of the General Partner's
            common stock, at their option, at a conversion and exchange rate of
            2.272727 Common OP Units or shares of the General Partner's common
            stock, as the case may be, for each Series B Preferred Unit (rounded
            to the lower whole number), provided the General Partner has
            received at least sixty (60) days prior written notice of such
            conversion or exchange, such notice to specify the number of Common
            OP Units and number of shares

                                       11
<PAGE>

            of the General Partner's common stock to which the Series B
            Preferred Units are to be converted or exchanged.

                  (iii) The conversion/exchange rate is subject to adjustment
            upon subdivisions, stock splits, stock dividends, combinations and
            reclassification of the common stock of the General Partner.

                  (iv) In case the General Partner shall be a party to any
            transaction (including, without limitation, a merger, consolidation,
            statutory share exchange, tender offer for all or substantially all
            of the General Partner's capital stock or sale of all or
            substantially all of the General Partner's assets), in each case as
            a result of which the General Partner's common stock will be
            converted into the right to receive shares of capital stock, other
            securities or other property (including cash or any combination
            thereof), each Series B Preferred Unit will thereafter be
            convertible or exchangeable into the kind and amount of shares of
            capital stock and other securities and property receivable
            (including cash or any combination thereof) upon the consummation of
            such transaction by a holder of that number of shares of the General
            Partner's common stock or fraction thereof into which one Series B
            Preferred Unit was convertible or exchangeable immediately prior to
            such transaction.

                  (v) Limitations on Conversion and Exchange. Notwithstanding
            anything to the contrary in this Section 17.8(a):

                        (A) Upon tender of any Series B Preferred Units to the
                  General Partner pursuant to that Section, the General Partner
                  may issue cash in lieu of stock to the extent necessary to
                  prevent the recipient from violating the Ownership Limitations
                  of Section 2 of Article VII of the Charter, or corresponding
                  provisions of any amendment or restatement thereof; and

                        (B) A holder of Series B Preferred Units will not have
                  the right to exchange Series B Preferred Units for the General
                  Partner's common stock if (1) in the opinion of counsel for
                  the General Partner, the General Partner would no longer
                  qualify or its status would be seriously compromised as a real
                  estate investment trust under the Internal Revenue Code as a
                  result of such exchange; or (2) such exchange would, in the
                  opinion of counsel for the General Partner, constitute or be
                  likely to constitute a violation of applicable securities
                  laws. In the event of either such occurrence, the General
                  Partner shall purchase such holder's Series B Preferred Units
                  for cash at a purchase price of $100 per Series B Preferred
                  Unit.

                  (vi) Reservation of Common Stock. The General Partner shall at
            all times reserve and keep available a sufficient number of
            authorized but unissued shares of common stock to permit the
            exchange of all of the outstanding Series B Preferred Units pursuant
            to this Section 17.8.

            (b) Series B-2 Preferred Units. The holders of Series B-2 Preferred
            Units shall be entitled to convert all, or any portion, of the
            Series B-2 Preferred Units into Common OP Units during the ninety
            (90) day period immediately following the third (3rd) anniversary of
            the Series B-2 Issuance Date, at a conversion price of $45.00 for
            each Series B-2 Preferred Unit, provided the General Partner has
            received at least thirty (30) days prior

                                       12
<PAGE>

            written notice of such conversion, such notice to specify the number
            of Common OP Units into which the Series B-2 Preferred Units are to
            be converted.

            (c) Procedure for Conversion or Exchange.

                  (i) Any conversion or exchange described in Section 17.8(a) or
            (b) above, shall be exercised pursuant to a notice of conversion or
            exchange (the "SERIES B AND SERIES B-2 CONVERSION/EXCHANGE NOTICE")
            delivered to the General Partner by the holder who is exercising
            such conversion or exchange right, by (A) fax and (B) by certified
            mail postage prepaid. The Series B and Series B-2
            Conversion/Exchange Notice and certificates, if any, representing
            such Series B Preferred Units or Series B-2 Preferred Units, as
            applicable, to be converted or exchanged shall be delivered to the
            office of the General Partner maintained for such purpose.
            Currently, such office is:

                        Sun Communities, Inc.
                        31700 Middlebelt Road, Suite 145
                        Farmington Hills, Michigan 48334.

            Any conversion or exchange hereunder shall be effective as of the
            close of business on the conversion or exchange date. The holders of
            the converted or exchanged Series B Preferred Units and Series B-2
            Preferred Units shall be deemed to have surrendered the same to the
            Partnership or the General Partner, as the case may be, and the
            Partnership or the General Partner, as the case may be, shall be
            deemed to have issued Common OP Units or shares of common stock of
            the General Partner, as applicable, at the close of business on the
            conversion or exchange date.

            (d) Payment of Series B and the Series B-2 Priority Return. On the
      Series B Cumulative Preferred Unit Distribution Payment Date next
      following a conversion or exchange date, the holders of Series B Preferred
      Units or Series B-2 Preferred Units, as applicable, which converted or
      exchanged on such date shall be entitled to Series B Priority Return or
      Series B-2 Priority Return, respectively, in an amount equal to a prorated
      portion of the Series B Priority Return or the Series B-2 Priority Return,
      as applicable, based on the number of days elapsed from the prior Series B
      Cumulative Preferred Unit Distribution Payment Date through, but not
      including, the conversion or exchange date.

            SECTION 17.9 NO SINKING FUND. No sinking fund shall be established
      for the retirement or redemption of Series B Cumulative Preferred Units.

      7. Governing Law. This Amendment shall be interpreted and enforced
according to the laws of the State of Michigan.

      8. Full Force and Effect. Except as amended by the provisions hereof, the
Agreement, as previously amended, shall remain in full force and effect in
accordance with its terms and is hereby ratified, confirmed and reaffirmed by
the undersigned for all purposes and in all respects.

      9. Successors/Assigns. This Amendment shall be binding upon and shall
inure to the benefit of the parties hereto, their respective legal
representatives, successors and assigns.

      10. Counterparts. This Amendment may be executed in counterparts, all of
which together shall constitute one agreement binding on all the parties hereto,
notwithstanding that all such parties are not signatories to the original or the
same counterpart. Reproductions (photographic, facsimile or

                                       13
<PAGE>

otherwise) of this Amendment may be made and relied upon to the same extent as
though such reproduction was an original.

      IN WITNESS WHEREOF, the undersigned have executed this Amendment as of the
day and year first above written.

                               GENERAL PARTNER:

                               SUN COMMUNITIES, INC., a Maryland corporation

                               By: /s/ Jeffrey P. Jorissen
                                   -----------------------------------------
                                   Jeffrey P. Jorissen, Senior Vice President,
                                   Treasurer, Chief Financial Officer,
                                   and Secretary

                               SERIES B-2 PREFERRED PARTNER:

                               BAY AREA LIMITED PARTNERSHIP, a Michigan limited
                               partnership

                               By: JAM Management Company, a Michigan
                                   corporation, General Partner

                               By: /s/ James A. Morse
                                   -----------------------------------------
                                   James A. Morse, President

                                       14

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