An extra $200/mo. to me wouldn't be worth it to have so many families/people under one roof.

.”• I pay all the costs – things like Real Estate Commission - Title Insurance - Escrow Fees - Transfer Tax -Termite Clearance - Roof Certification – the list goes on and on..• And I buy them in an “as is” condition.

Well basically I have had connections to help with the roof on to help gut the house as well as try to GC some of the little bit of stuff I needed done but far as that just the finance guyWhat was the outcome?

You can have two properties with similarly sized roofs in two completely different neighborhoods at different cost points. 10% "might" be a starting point, but it depends on a lot.

BUT, I had to put on a new roof which I didn't think I needed.

I believe that this might be due to a leaking roof but I'm not sure. 

From the floor joist being cut from the sill plates and the entire house needing brought to level, the foundation requiring correction, to the no slope rubber roof leaking and needing replaced when I say I renovated every square inch of this property I mean that literally.

Hello, we sold a house and during the final walkthrough the buyers noticed the well pump leaking.

Lots of things come immediately to mind:  Septic problems, a new roof, HVAC failure, lower-than-projected rents. 

and most of the time is  bad management, bought the wrong price, Interest and Insurance to the roof and, I cant get out the Bridge loan to do a DSCR loan etc ...Simple hands on, work do research and minimize risk.