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                                                                Exhibit 10.73


                     NON-NEGOTIABLE SECURED PROMISSORY NOTE


$8,000,000                                                      TUCSON, ARIZONA
                                                               NOVEMBER 13, 1996


         1.       Principal Amount.  For Value Received, SOFTEN REALTY,
L.L.C., a Delaware limited liability company ("Maker"), promises to
pay to the order of SIERRA TUCSON, INC., a Delaware corporation
("Payee"), the principal amount of $8,000,000 upon the terms and
conditions herein contained.

         2.       Interest.

                  (a) Maker shall pay interest on the unpaid principal amount
hereof from the date hereof until such unpaid principal is paid in full at a per
annum rate equal to 8%. Payments of interest on the unpaid principal amount
hereof shall be due and payable pursuant to Section 3 hereof.

                  (b) Any amount of principal and/or interest hereof which is
not paid when due, whether at stated maturity, by acceleration or otherwise,
shall bear interest from the date when due until said principal and/or interest
amount is paid in full, payable on demand, at an interest rate equal to 2% per
annum in excess of the interest rate determined pursuant to Section 2(a) hereof.

         3.       Payments.  The principal amount hereof and all accrued
and unpaid interest thereon shall be due and payable as follows:

                  (a)      $500,000 of the principal amount hereof, together
         with accrued interest hereon, shall be due and payable on
         December 31, 1996; and

                  (b) The remainder of the principal amount hereof, together
         with accrued interest hereon, shall be due and payable in 72 equal
         monthly installments of $104,166.67 each commencing on February 1, 1997
         and continuing on the first day of each and every calendar month
         thereafter until the principal amount hereof, together with accrued
         interest thereon, is paid in full.
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         All payments of principal and interest in respect of this Note shall be
made in lawful money of the United States of America in immediately available
funds and delivered to Payee on the date due at 16600 North Lago Del Oro
Parkway, Tucson, Arizona 85739, or at such other place as the holder hereof may
from time to time designate in writing.

         4.       Prepayment.  Maker, without premium or penalty, may
prepay this Note in whole or in part, with accrued interest to the
date of such prepayment on the amount prepaid.

         5.       Security. This Note, and the obligations of Maker hereunder,
are secured by Maker's grant to Payee of a security interest in and to certain
collateral pursuant to that certain Security Agreement dated as of the date
hereof between Maker, as grantor, and Payee, as secured party (the "Security
Agreement").

         6.       Events of Default.  The occurrence of any one or more of
the following events shall constitute an event of default ("Event
of Default") hereunder:

                  (a) Maker shall fail to pay any principal or interest on this
         Note when due, whether at maturity, by acceleration, by notice of
         prepayment or otherwise, and such failure shall continue for two days
         after the date due;

                  (b) Maker shall default in the due performance of any other
         covenant contained in any of this Note or the Security Agreement and
         such default shall remain unremedied for ten days following
         notification by Payee of such default;

                  (c) any representation or warranty made by Maker in
         this Note or the Security Agreement shall prove to have
         been false or misleading when made;

                  (d) default in payment shall be made with respect to any
         indebtedness of Maker in excess of $50,000;

                  (e) final judgment(s) for the payment of money in excess of
         $50,000 shall be rendered in the aggregate against Maker;

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                  (f) a Change of Control (as hereinafter defined shall occur);

                  (g) any of the Note or the Security Agreement shall, for any
         reason, not be or shall cease to be in full force and effect or is
         declared to be null and void or the Security Agreement shall not give
         or shall cease to give Maker the liens, rights, powers and privileges
         purported to be created thereby (including a first priority perfected
         security interest in, and lien on, all of the collateral subject
         thereto) in favor Maker; or

                  (h) Maker shall (i) file any proceeding in bankruptcy or
         reorganization, (ii) make an assignment for the benefit of creditors or
         (iii) fail to vacate, discharge or dismiss within 60 days of its
         initiation either (a) the filing of a proceeding in bankruptcy or
         reorganization against it or (b) the appointment of a receiver or
         trustee for all or any part of Maker's assets or property.

         For purposes of this Note, the term "Change of Control" shall mean (i)
the consolidation, merger of Maker with or into any other person or entity; (ii)
the sale or other transfer of all or majority of the outstanding equity
securities of Maker (other than to persons or entities which are affiliated with
the present beneficial owners thereof); or (iii) the sale of substantially all
of Maker's assets to another person or entity.

         7.       Remedies. Upon or at any time after the occurrence of an Event
of Default specified in Section 6(a) through 6(g) hereof, this Note shall, at
the option of Payee, become due and payable forthwith, without demand upon or
notice to Maker, and upon the occurrence of any such Event of Default Payee
shall have all the rights and remedies provided under applicable law. If an
Event of Default specified in Section 6(h) hereof shall have occurred, this
Note, and all amounts payable hereunder, shall thereupon and concurrently become
due and payable without presentment, demand, protest, notice of acceleration,
notice of intent to accelerate or other notice of any kind, all of which are
hereby expressly waived by Maker, anything in this Note to the contrary
notwithstanding.

         8.       Non-Negotiable Note.      This Note is non-negotiable.

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         9.       Notices. Unless otherwise specifically provided herein, any
notice or other communication herein required or permitted to be given shall be
in writing and may be personally served, telecopied, telexed or sent by United
States mail and shall be deemed to have been given when delivered in person,
upon receipt of telecopy or telex or five days after deposit in the United
States mail, registered or certified, with postage prepaid and properly
addressed. For the purpose hereof, the addresses of the parties hereto (until
notice of a change thereof is delivered as provided in this Section 9) shall be
in the case of Payee, its address as set forth in Paragraph 3 hereof, and in the
case of Maker, c/o Apollo Real Estate Advisors, L.P., 1301 Avenue of the
Americas, 38th Floor, New York, New York 10019.


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         IN WITNESS WHEREOF, Maker has executed and delivered this Note as of
the day and year first above written.

                                      MAKER:

                                      SOFTEN REALTY, L.L.C., a Delaware
                                      limited liability company

                                      By:      NEXTHEALTH, INC., a Delaware
                                               corporation




                                      By: /s/  Bob Walton
                                         -----------------------------------
                                         Name:  Bob Walton
                                         Title: Authorized Representative

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