She has made false and unverified claims against me time and time again.How do I deal with such a tenant?

We've custom designed reports for clients before, so maybe your PMCs can do the same?

Cash flow numbers will ideally be at $150-$200 per rental unit.

If the tenant calls and says my door lock don’t work I deal with it nor I call a handyman.  

Not ideal, but the current owner has had health issues that have deterred from fully leasing the building.

If you found the ideal property for this type of niche, what would be your first step in seeking out a business operator who would rent the property from you for any of the above purposes?

US Prime Rate is used by consumers – it is the rate at which banks lend to their best customers."

I wouldn't be in a hurry to pay off my primary. 7% isn't ideal, but you can get more return in the stock market.

Purchase price: $1,150,000 Cash invested: $300,000 Sale price: $1,628,000 Built in 1890, this Old Victorian was converted into a duplex in the 70's by a talented architect who made some unique and extraordinary custom design choices (read vaulted skylights) that made this property truly one of a kind.

I think you covered a lot of things already I was going to say, especially amenities and customer avatar.