Your par rate for a 30 year DSCR for a 4 unit that with a good credit score will be high 7s most and your payment will be 6500. 

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

You may be even selling some of these smaller assets and roll the equity into the bigger dealsThese small deals can make an investor incredibly wealthy, especially if the equity is owned by a few investors.

Does this mean, I am not able to refinance to a lower rate in the future until 5 years or I would have to pay a penalty if I were to do it earlier than 5 years.Thank You, A lot depends on your credit score, the loan to value, the loan size and the DSCR number. 

And tons of webpages seem to just copy from room score I have tried to find out more with google and asked local Atlanta hosts and nobody had heard anything about that.

Im assuming Credit score, full background check and eviction. 

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

It's incredible how much you can get done by simply:- Treating your VAs well, like people with feelings and families to provide for (because they are!)

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

Its incredibly easy to setup and relatively stable.