Document:

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                                                                    EXHIBIT 10.3

                  FOURTH AMENDED AND RESTATED PROMISSORY NOTE

DUE DATE:  DECEMBER 18, 2002                             DETROIT, MICHIGAN
                                                DATED: AS OF JUNE 18, 2002

         FOR VALUE RECEIVED, ORIGEN FINANCIAL, L.L.C., a Delaware limited
liability company (the "Borrower"), promises to pay to the order of SUN
COMMUNITIES OPERATING LIMITED PARTNERSHIP, a Michigan limited partnership
("Lender"), at 31700 Middlebelt Road, Suite 145, Farmington Hills, Michigan
48334, or at such other place as Lender may designate in writing, the principal
sum of TWENTY THREE MILLION ONE HUNDRED TWENTY-FIVE THOUSAND AND NO/100 DOLLARS
($23,125,000) (the "Credit Limit"), or such lesser sum as shall have been
advanced by Lender to Borrower under the loan account hereinafter described,
plus interest as hereinafter provided, all in lawful money of the United States
of America, in accordance with the terms hereof. This Note is subject to the
terms of that certain Amended and Restated Subordinated Loan Agreement between
Borrower, Origen Financial, Inc. ("Origen Inc.")(which was merged with and into
Borrower effective April 25, 2002) and Lender dated February 1, 2002, as amended
by the First Amendment to Amended and Restated Subordinated Loan Agreement dated
March 22, 2002 and the Second Amendment to Amended and Restated Subordinated
Loan Agreement dated June 18, 2002 (the "Amended Loan Agreement"), the terms of
which are incorporated herein by reference.

         ADVANCES. This Note is given as evidence of any and all indebtedness of
the Borrower to Lender arising as a result of advances or other credit which may
be made under this Note from time to time. Lender shall, from time to time prior
to the Due Date, make advances to Borrower hereunder upon request therefor by
Borrower, provided that upon giving effect to such advance no Event of Default
(as hereinafter defined) and no event which with notice and/or the passage of
time would become an Event of Default shall exist, and that all representations
and warranties of Borrower theretofore made are true and correct and that Lender
shall not have previously or concurrently declared all amounts owing hereunder
to be immediately due and payable and that the amount requested shall not cause
the total amount outstanding hereunder to exceed Credit Limit. Advances
hereunder may be requested by telephone, in writing or in any other manner
acceptable to Lender. The principal amount of indebtedness owing pursuant to
this Note shall change from time to time decreasing in amounts equal to any and
all payments of principal made by the Borrower and increasing by amounts equal
to any and all advances made by Lender to the Borrower pursuant to the terms
hereof. The books and records of Lender shall be conclusive evidence of the
amount of principal and interest owing hereunder at any time, unless Lender
receives a written statement of exceptions from Borrower within ten (10) days
after such statement has been furnished. From time to time but not less than
quarterly, Lender shall furnish Borrower a statement of Borrower's loan account.

         INTEREST. The unpaid principal balance of this Note shall bear
interest, computed on the basis of a year of 360 days for the actual number of
days elapsed in a month, at a rate of interest of 700 basis points over LIBOR
(the "Rate"), which Rate shall not be less than 11% per annum or exceed 15% per
annum (the Rate shall be adjusted for purposes of this Note on the last day of
every fiscal quarter

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beginning on March 31, 2002), until the entire principal balance of this Note,
and all accrued and unpaid interest has been paid in full.

         PAYMENT. Accrued and unpaid interest on the unpaid principal balance of
this Note from time to time shall be due and payable monthly, in arrears, on the
last day of each consecutive month until the Due Date. The remaining principal
balance shall be due and payable on the Due Date, along with any accrued and
unpaid interest as of the Due Date.

         All payments made hereunder shall be applied first against costs and
expenses required to be paid hereunder, then against accrued interest to the
extent thereof and the balance shall be applied against the outstanding
principal amount hereof. Borrower expressly assumes all risks of loss or delay
in the delivery of any payments made by mail, and no course of conduct or
dealing shall affect Borrower's assumption of these risks.

         DEFAULT. Upon the occurrence of an Event of Default, as defined in the
Amended Loan Agreement, the entire unpaid principal balance and all accrued and
unpaid interest owing under this Note shall, at Lender's option, be immediately
due and payable, together with costs and attorneys fees reasonably incurred by
Lender in collecting or enforcing payment.

         Acceptance by Lender of any payment in an amount less than the amount
then due shall be deemed an acceptance on account only, and Borrower's failure
to pay the entire amount then due shall be and continue to be a default. Upon
the occurrence of any Event of Default, neither the failure of Lender promptly
to exercise its right to declare the outstanding principal and accrued unpaid
interest hereunder to be immediately due and payable, nor the failure of Lender
to demand strict performance of any other obligation of Borrower or any other
person who may be liable hereunder, shall constitute a waiver of any such
rights, nor a waiver of such rights in connection with any future default on the
part of Borrower or any other person who may be liable hereunder.

         INTEREST RATE LIMITED TO MAXIMUM RATE. Notwithstanding anything herein
to the contrary, in no event shall Borrower be required to pay a rate of
interest in excess of the Maximum Rate. The term "Maximum Rate" shall mean the
maximum non-usurious rate of interest that Lender is allowed to contract for,
charge, take, reserve or receive under the applicable laws of any applicable
state or of the United States of America (whichever from time to time permits
the highest rate for the use, forbearance or detention of money) after taking
into account, to the extent required by applicable law, any and all relevant
payments or charges hereunder, or under any other document or instrument
executed and delivered in connection herewith and the indebtedness evidenced
hereby.

         In the event Lender ever receives, as interest, any amount in excess of
the Maximum Rate, such amount as would be excessive interest shall be deemed a
partial prepayment of principal, and, if the principal hereof is paid in full,
any remaining excess shall be returned to Borrower. In determining whether or
not the interest paid or payable, under any specified contingency, exceeds the
Maximum Rate, Borrower and Lender shall, to the maximum extent permitted by law,
(a) characterize any

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non-principal payment as an expense, fee, or premium rather than as interest;
(b) exclude voluntary prepayments and the effects thereof; and (c) amortize,
prorate, allocate and spread the total amount of interest through and including
the Due Date (including the period of any extension or renewal thereof) so that
the interest on account of such indebtedness shall not exceed the Maximum Rate.

         SUCCESSORS/ASSIGNS. This Note shall be binding upon Borrower and its
successors and assigns, and the benefits hereof shall inure to Lender and its
successors and assigns.

         GENERAL. Borrower and all endorsees, sureties and guarantors hereof
hereby jointly and severally waive presentment for payment, demand, notice of
non-payment, notice of protest or protest of this Note, and Lender diligence in
collection or bringing suit, and do hereby consent to any and all extensions of
time, renewals, waivers or modifications as may be granted by Lender with
respect to payment or any other provisions of this Note. The liability of
Borrower under this Note shall be absolute and unconditional, without regard to
the liability of any other party.

         This Note has been executed in the State of Michigan, and all rights
and obligations hereunder shall be governed by the laws of the State of
Michigan.

         To secure the payment of all amounts due to Lender by Borrower in
connection with the loan evidenced by this Note and pursuant to terms of the
Amended Loan Agreement and this Note, Borrower, both on its own behalf and as
successor to Origen Inc., has granted Lender a security interest in the assets
described under the following documents: (i) the Security Agreement dated
February 1, 2002 between Borrower and Lender, as amended from time to time, (ii)
Amended and Restated Security Agreement dated February 1, 2002 between Origen
Inc. and Lender, as amended from time to time, (iii) the Amended and Restated
Stock Pledge Agreement dated February 1, 2002 between Origen Inc. and Lender, as
amended from time to time, (iv) the Limited Liability Company Interest Security
and Pledge Agreement dated February 1, 2002 between Borrower and Lender, as
amended from time to time, and (v) the Amended and Restated Limited Liability
Company Interest Security and Pledge Agreement dated February 1, 2002 between
Origen Inc. and Lender, as amended from time to time.

         This Note is an amendment to and restatement of that certain Third
Amended and Restated Promissory Note dated March 22, 2002 executed by Borrower
and Origen Inc. in favor of Lender (the "Prior Note"), and this Note amends,
supersedes and replaces the Prior Note.

                                    BORROWER:

                                    ORIGEN FINANCIAL L.L.C., a Delaware limited
                                    liability company

                                    By:               /s/ Ronald A. Klein
                                       -----------------------------------------
                                    Its:              Chief Executive Officer
                                       -----------------------------------------

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                                                                    EXHIBIT 10.4

                               FIRST AMENDMENT TO
                  AMENDED AND RESTATED PARTICIPATION AGREEMENT

         THIS FIRST AMENDMENT TO AMENDED AND RESTATED PARTICIPATION AGREEMENT
("Amendment") by and between SUN COMMUNITIES OPERATING LIMITED PARTNERSHIP
("Lender"), and WOODWARD HOLDING, LLC ("Participant") is entered into as of June
18, 2002.

                                    RECITALS

         A. Lender and Participant have entered into that Amended and Restated
Participation Agreement effective as of March 22, 2002 (the "Original
Agreement"). All capitalized terms not defined in this Amendment shall have the
meanings given to them in the Original Agreement.

         B. Pursuant to the Second Amendment to Amended and Restated
Subordinated Loan Agreement dated June 18, 2002, and the Fourth Amended
Promissory Note dated as of June 18, 2002, the amount of the Line of Credit has
been increased to $23,125,000.

         C. Origen Inc. was merged with and into Origen LLC effective April 25,
2002 and Origen LLC is therefore the successor to Origen Inc.'s obligations
under the Loan Agreement and the Line of Credit Note.

         D. Lender and Participant desire to amend the Original Agreement in
accordance with the terms and conditions of this Amendment.

         NOW, THEREFORE, in consideration of the premises and the mutual
undertakings herein contained, Lender and Participant hereby agree as follows:

         1.       Amended Definitions.

                  (a) The definition of "Loan Agreement" is hereby amended to
         mean the Amended and Restated Subordinated Loan Agreement dated
         February 1, 2002, as amended by the First Amendment to Amended and
         Restated Subordinated Loan Agreement effective as of March 22, 2002 and
         the Second Amendment to Amended and Restated Subordinated Loan
         Agreement dated June 18, 2002, each among Lender and the Borrowers.

                  (b) The definition of "Line of Credit Note" is hereby amended
         to mean the Fourth Amended Promissory Note dated June 18, 2002 in the
         original principal amount of $23,125,000 executed by Borrower in favor
         of Lender.

                  (c) The definition of "Line of Credit" is hereby amended to
         mean the line of credit facility in the amount of $23,125,000 provided
         to Borrower by Lender pursuant to the Loan Agreement and the Line of
         Credit Note.

                  (d) All references to "Borrowers" are hereby amended to be
         "Borrower" and the definition of "Borrower" is hereby amended to mean
         Origen Financial L.L.C.

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         2. Shared Committed Amount. The Shared Committed Amount is hereby
amended to be $23,125,000. Lender and Participant acknowledge that (a) each of
them continues to own an undivided 50% interest in the Shared Committed Amount,
(b) Lender has committed to lend a total of $12,500,000 under the Line of Credit
and owns an undivided 54.05% interest in the entire Line of Credit, and (c)
Participant has committed to lend a total of $10,625,000 under the Line of
Credit and owns an undivided 45.95% interest in the entire Line of Credit.

         3. Origination Fees. Lender shall credit to Participant's account
$4,687.50, or 50% of the origination fees received by Lender from Borrower in
connection with the increase in the amount of the Line of Credit to $23,125,000.

         4. Miscellaneous. Unless otherwise modified by this Amendment, all
provisions of the Original Agreement shall remain unchanged and in full force
and effect in accordance with its terms. The Original Agreement, as amended by
this Amendment, sets forth the entire agreement and understanding of the parties
to it, and supersedes all prior agreements, arrangements and communications,
whether oral or written, with respect to its subject matter. This Amendment may
be executed in counterparts, each of which shall be deemed an original and all
of which together shall constitute one and the same agreement. Copies
(photostatic, facsimile or otherwise) of signatures to this Amendment shall be
deemed to be originals and may be relied on to the same extent as the originals.

         IN WITNESS WHEREOF, the parties have executed this First Amendment to
Amended and Restated Participation Agreement as of June 18, 2002.

                                    "LENDER"

                                    SUN COMMUNITIES OPERATING LIMITED
                                    PARTNERSHIP, a Michigan limited partnership

                                    By:      Sun Communities, Inc., a Maryland
                                             corporation
                                    Its:     General Partner

                                                 /s/ Gary A. Shiffman
                                             -----------------------------------
                                             By:      Gary A. Shiffman
                                             Its:     President

                                  "PARTICIPANT"

                                    WOODWARD HOLDING, LLC, a Michigan
                                    limited liability company

                                                 /s/ Paul A. Halpern
                                             -----------------------------------
                                             By: Paul A. Halpern
                                             Its: Manager

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