If it's already turnkey that means you're paying higher rates than necessary when you could put 20% down and get a DSCR loan with lower rates and fees. 

Do you have to pay a bit of a premium for that luxury? 

I ran some of your numbers, assumed rent of $1,290/unit and that you pay cash for the rehab costs.

If you have cash, you could pay off the underlying loan2.

Also, providing value to others at a high level will pay off for you in the end if you stick with it.

Why pay off the mortgage early? 

@Parmesh P. there is no such TDA paying 7% or even 6% long term,5 years or longer.

If not, who do you believe the natural buyer is and why do you believe they will pay retail when they can replicate what you accomplished with any number of available properties on the market at any given time?

I have found that they worked really well when it comes to getting better tenants and better rents, and having less hassle, less headaches, and then getting a higher sales price; without paying closing costs or realtor fees.

You don't provide enough data to know.Every product is only worth what you are willing to pay for it.