I have close to 100 doors, thus I will pick up something even if it is barely cash flowing so that my other cash flowing assets can pay down the mortgage reasonably quick.

Expecting a pick-up for January 1st lease expirations.

this will yield a bunch of random markets all over the countrywhy not pick a market where you have some kind of advantage and focus all your energy on that? 

Make sure to pick the right house and the right criteria, that's all

Pick 2-4 locations, get no more than about 6 deep in any but no less than 2 deep.

Pickings are slim around here for good ones, and what makes a good PM for one LL isn't the same criteria as for another. 

Are you intentionally using all three just to pick up some of the services they each uniquely offer that don't overlap, and to be able to choose which ones are strong in a particular area?  

Part of the premise of hiring a manager is that they will manage repairs, including efficiency of repairs.Anyone can pick up a phone and throw unlimited amounts of money at a vague reported problem.

Pick plots you can add value to.  

So even if you pick a state with stronger protections like WY or NV, the cause of action arose in the state where the tenant fell, so likely that the court where the accident happened would have jurisdiction.