But certain tenant types I would accept nothing but cash.

All foreclosures are based on gross fraud, forged signatures,fake documents, corrupted judges who are criminals working for the bankers.The same goes for the attorneys.This country doesn't have the lawyers, and public officials are not following the law.Not the common law not even their own fake, UCC code color of law.BAR attorneys are foreign agents trained to destroy American people and American Constitution!

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Looking to buy a property management company in King County or learn from those who have experience with this type of transaction as a way to grow their real estate management business. 

Although it is even smoother if you work with some one who does both types of loan. 

I have seen this type of thing unfold time after time.

@John Oks What type of service(s) are you looking for?

What made you interested in investing in this type of deal?

So, one program may have a "forgivable" option and a "payback" option type of thing. 

5) What type of problems are you having?