One benefit of using its site is the close relationship realtors have with the Multiple Listing System (MLS) that provides data feeds used by most sites on this list.

Don't try to convince them to sell just start building a relationship so you are the first one they call when they are ready to sell.

What is a relationship between average investor's competency now and 5,10,20 years ago?

I hand wrote 100 letters and spoke to a few sellers, and didn't really get anything but a little action speaking to people and actually making moves, it was very exciting.I would really love to build a relationship with someone who does Real Estate local.

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

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.

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