Once they meet the basic criteria, a demonstrated history of not being a rule breaker.

Which circuits do you browse for the tri-state region properties, do they still hold local court house auctions? 

We luckily found a somewhat bullish, capital ready group that had very few contingencies (other than awarded credit)...so now fingers crossed we are in the top 3 in # of units for the county (the tie breaker metric). 

For one of my rentals, insurance through NFIP was a deal breaker, but I was able to get it through a private company at a small fraction of the cost, and the lender is fine with it.

This issue can be as simple as a tripped breaker.

The city issuing it can be a deal breaker in itself.

There are new electric boxes for all six units split out with a couple circuits run up to each unit, probably just in the kitchens.

You might ask the electrician to either 1) install wires to support a 50 A outlet; it's then OK to install a smaller (fewer amps) breaker and outlet if needed, or 2) install conduit large enough to support wires for a 50 A outlet, then run just the size of wires needed today. 

They need to be wired to a dedicated circuited with an ARC fault and a lockout feature. 

.#1- it had a Federal Pacific breaker box.