Specifically, more on your partnership and the roles played, the funding (saw in your original post you were exploring options), and how you are managing the properties.

I just don’t know what the long term play is with these.

What role does being named "Additional Insured" play within the context of a Lender?

You might have been able to get the tax sale cancelled in not, but at the same time you might have made out just as well the way it played out.   

I feel there’s too many variables that can come in play.

Also, some lenders can do "no ratio" dscr loans but cash flow does play big part in pricing so keep that in mind. 

You can even have both meet and play nice in the sandbox.

The property easily can be monitored from a mobile phone, tablet, laptop and/or desktop, and the software has screenshot and video capture capabilities, as well as the user being able to access and play historical footage from all or selected cameras simultaneously, if incidents need to be researched.What was the outcome?

Cheap curtains hung up on the first floor, a welcome mat, lights on a timer, battery operated fake candles on a timer, big size 11 men's shoes and big men's jacket hung by the front door, two empty dog bowls, a tie out in the back yard (for a dog), fan on a timer, foldable table and chairs with a tablecloth and centerpiece, and radio playing on a timer.  

The sad truth is most in the BP community believe the horrible deal with favorable seller financing where zero out of pocket is required is a better real estate play than the great deal that requires traditional financing.