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

This is what I see mostly on these ads as well.

do you add bathrooms and convert the garage to rooms as well?

We also do not allow the tenant to patch holes or touch up the paint, because they usually do a terrible job that takes longer and costs more to fix. 

Freddie Mac will allow you to finance each property and the Maximum is 10 loans on credit.

Once you purchase the property, you can look into doing a cash out refi to pay off the HELOC balance. 

Price RangeDefine your financial boundaries based on available capital and borrowing ability:For Class A & B, financing typically covers 75%-80% of the purchase price, allowing you to buy properties in the $6M-$12M range if you have $2.3M total cash.For Class C & D, due to higher risk, the price range might be reduced to $5M-$10M with the same cash.5.

But, we do have them and we are an extremely well-run company. 

Some of his advice didn't age well.

There are plenty of deals in Philly on and off-market from wholesalers, who are pretty decent in Philly compared to other places.You will need to get your GC license here and learn the permitting process and necessity here as well.