But due to change in circumstances, I cannot move into that new home for a while.

Under the circumstances it's not like you're going to execute a contract with the seller and assign it to your buyer, so you may want to work out a partnership for these potential deals... in advance of the meeting.

At some point in time circumstances will be such that you will sell at a over all lose.

@Kyle Cortez the timing of the gift will be dependent on the facts and circumstances.

One unforeseen expense, and you could likely end up making no money, or, even worse, be unable to pay back your partner.Even in poor circumstances (assuming you've still made some profit), your partner will most likely see a decent return (in our examples, 12% in the worst case and 107% in the best case). 

In this circumstance I think they would be more likely to work with you on fees and such.

dual source of repayment.. you and the tenant.. the risk in money comes when the fed's require banks to make loans to those that do not qualify under normal circumstances.. the CRA really hammered banks and lenders..

Time has a way of changing people's circumstances and needs.

Worst case scenario is that they will gain a prescriptive easement to your property because you knew and neglected to do anything about it. 

As already stated you have fulfilled your responsibilities, Take one or two space heaters and do not give a rent rebate...sets a bad precedent and not required under the circumstances.