What I wrote above does not create an attorney/client relationship between us.

Have increased rent rates historically trailed property value increases?

Make sure to verify historical occupancy, crime rates etc.

check your local ordinance as here it is 1.5 parking spaces per unit, also check the lease agreement if it does not clearly state 2 spot allowance then they arent entitled to it , so youll just want to negotiate that, but try and have the current owner do that as they already have a preexisting relationship and if you are moving in, the last thing you want is angry tenants next to you

I'd appreciate any advice on which investor-friendly banks/credit unions would be best to build a relationship with. 

What I wrote above does not create an attorney/client relationship between us.

I dont really have any relationships with property managers in the area, though I know there are a few out of Indianapolis.

I could see a case and historical record for either and eventually both :)

.- Cost of work required based on current market rates (for example right now electrical work is very expensive in Charlotte metro compared to historical norms)- Are any code issues with the City of Charlotte or LUESA? 

Be patient, drive by the parks, develop relationships with park  managers, and the next thing you know you have too many to buy.