I won't even go to places to eat once I find my tenant works there out of fear...not that they did anything, but they will "gift" you something they don't own and then also expect the favor back in rents.....it just doesn't work out.

Think child actors/actresses and such, to my understanding as a course of law, such an agreement would heavily favor the child (the court wouldn't look favorably upon you for mishandling a contract with a minor).There are certainly cases where a minor is emancipated and then able to receive certain benefits a minor wouldn't customarily be entitled to. 

In the first example, the price would generally be whatever the two of you agree to, and in this case you are doing them a favor. 

Then they say stupid things like "we buried Aunt Edna in the backyard because she loved the Orange Tree" and buyers say stupid things like "What an ugly collection of Urns on the mantle" when Fluffy the favored cat has her ashes in the Urn.

@Jairhad HemmonsYou're describing "house hacking" in a duplex or triplex (often spoken favorably here on BP....search if you haven't read those posts).

This analysis neglects all taxable consequences(which are generally favorable to you,) and all changes in asset value. 

Then the loan officer calls up the $4K guy and says "can you do me a favor and do it in 2 weeks". 

I hope things work out in your favor!

Do yourself a favor and get single family homes in the city and upgrade them with countertops/flooring/paint.

House hacking would get you in with a lower down payment using an FHA loan, and that is pretty favorable.