Have you been aggressively paying down your mortgage while you are in there to earn even more equity over the longer term? 

Maybe you could hook up with one of these battered women groups, and turn the place into a shelter for battered women, Where the charity would pay for all of the rooms and just use them as needed. 

I may even sweeten the pot and offer to pay them a few thousand to help them with moving costs.

I no longer qualified for traditional financing because I already own many rental properties and my DTI was high for the bank, so I purchased these in a business entity with a trusted private investor and was able to refi the 1st property/sell the 2nd property to pay back my investor and ultimately keep the better property for zero money down.

I am struggling to decide whether to get into this home or narrow down to a property that is $310k and can pay for the mortgage right out of the gate?

That will help you to pay your mortgage.

I would pay them in draws, and inspect their work every step of the way.

By short I mean about 6 months to buy a DSCR backed house and then I pay off interest for those 6 months and the principal and then I become sole owner?

Depending on the property and the level of care provided there, the residents pay $600 - $700/ month in rent that goes directly to you, the property owner, and has the care agreement with the operator for whatever their cost is.

You are paying down principal and that goes into your ROI calc.