There are a lot of studies on this but it is not the immediate response from professionals whose business it is to document all the ifs and and buts of a partnership and to  problem solve for the inevitable problems.

And what is the language I need to know as far as the definitions like forbearance etc.

The problem with these set ups is you agree to keep your mouth shut if things go bad, but be an advocator if things go well.That's in the language when you deal some of these turnkey folks.

And half of American renter households spend at least 30% of their income on housing, which is up sharply since 2000, according to Harvard University’s Joint Center for Housing Studies.

Make sure the language added to the contract includes being able to reinspect to ensure that the work has been done and/or receiving a certification or receipt from a professional providing proof the work has been done.

I’ve never closed a deal but I'm just gonna jump head first into it but I have been studying and reading lots and taking in content, I’ve done my due diligence.

If that's the case, then your next best bet is really concentrate on your studies.

Really study the market to determine what it should rent for.

This is also gonna depend on how strong the buyer is financially if its even possible for them to pay the difference.If you get multiple offers on a sale in the future and the price goes over asking, make sure the offer includes some type of language waiving a portion or all of the appraisal gap.If you tried to fight the appraisal already and didn't get anywhere, you don't really have much recourse.

@Zachary Hadjah It would do you well to take some time to study in depth the lease/option, rent to own niche.