I like the concept.Immediate cash flow to cover your note in the meantime, a health (but not excessive) amount as non refundable option consideration / earnest money / etc., and a six month window for the tenant buyer to actually get the financing worked out.

Dwelling units that generate in excess of 0.50 cubic yards of solid waste at any given time may be served utilizing an alternate collection system and charged according to a different and separate fee structure based on collection and disposal costs.

After all this happened and he sunk in excess of $40K a year into the home, he could have gotten the deed at least.

If the numbers work, and the deal is structured well (No kickbacks, payments outside of the HUD, excessive funds to junior lien holders, etc.) they would approve it.

Properties will sell in excess of the price that makes sense as a rental all the time.

The owner is allowed to invest the excess deferred cash payment (liquid or demand instruments) to make further passive income.

Any mortgagee charge(s), not to exceed....If Buyer is not accepted by mortgagee or the requirements for assumption are not in accordance with the terms of this Contract or mortgagee makes a charge in excess of the stated amount, Seller or Buyer may rescind this Contract by written notice to the other party unless either elects to pay the increase in interest rate or excess mortgage charges. 

In a lot of cases they would effectively be doing a "net listing" - because they are essentially keeping any proceeds in excess of a below market price.A legal manner to perform similar services would be to negotiate a higher commission with the seller and then double-end the listing. 

You could bank the funds (excess rents) in an account that you set to the side for this purpose. 

I dont have an enormous income but would be looking to sell off some excess tax credits I would have left over sounds like you might be interested in purchasing for a discount in the event I move forward.