I play along when cold called by the refi call center guys, probably get my credit run once every 3 months while playing along.

The SDIRA is responsible for all credits and debits incurred by the investment. 

But I recall Fannie Mae backed loans having a base DTI of 36% and it can go up to 45% if you meet credit score and reserve requirements.

You will still be able to dictate who you rent to based on credit score, criminal background, landlord references, work history etc..

I have very good credit so I’m not worried that I wouldn’t get a mortgage.

I have very good credit so I’m not worried that I wouldn’t get a mortgage.

And credit scores of around 650.

sounds like you have dealt with all the sharks.. if it takes a really long time to evict someone in that state your best bet maybe to let it go to foreclosure and if it bids up which it could if your buyers are already offering you whats owed. they would not do that if there was not equity above whats owed. your mom would get the overage as long as there is not junior debt.also since her credit is trashed and if you can handle her housing.. she can just stay as long as possible until she gets evicted and then just walk out the door..

Credit good. 

I have $ in savings, a solid W-2 dual income with wife, and 775+ credit score.