DSCR loans go up to 80% of the purchase price and depending on the Debt Service Coverage Ratio and your credit score you can expect rates on a 30 yr loan ranging from High 6%- Mid 8%. 

I only spoke with one person so far and they scheduled for more information gathering/ rental investment calls from them this upcoming week.

Id have a lawyer on hand, this person seems like they will escalate issues once you notify them you aren't renewing their lease.  

Quote from @Daniel Windingstad: Quote from @Obed Calixte: Some people have the personality, processes and systems & time to self manage, some do not.

Personally I wouldn't feel comfortable trying to wholesale a relatives $1M home knowing that I am breaking the law if I cross over into doing anything that can be considered representing them in the transaction, and knowing it will only be marketed to people who buy properties wholesale (typically investors who don't want to pay retail prices), instead of the majority of retail buyers active in the market who are typcially willing to pay more. 

I do direct booking through the Houfy website, taking credit card payment by Square. 

This deal proved to be the perfect balance of financial gain and personal enjoyment.

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

They are all under my personal name.

Overall I would personally consider how I can still grow with the freedom that I have focusing on my real estate.