I have gotten complaints that the police are always at the trailer and trash is scattered all over the lawn.

They just scatter from one unit to another.  

A few scattered rental homes, but all single family.

Fairborn has a good selection, and there are some scattered around the nicer suburbs too.It'll really be a question of what price point and neighborhood you want to invest in.Since your son will be at WPAFB, I'd start with Fairborn.

They are scattered out in mobile home subdivisions on lots that I own so I know what I can get for them and have a decent inventory stored up of various parts and things for repairs over the years.  

Is it 50 scattered units or 50 unit building.  

If you had a choice between owning 100 different 1 bedroom units/houses which might be scattered across a town and owning 1 100 unit apartment building, which would you choose if each route had similar total acquisition cost?

Pest/rodent friendly materials scattered throughout.

A lot of these guys are lazy and/or do work scatter brained and leave stuff looking unfinished.  

The East side is a bit rougher... but there are a few good patches mixed in, but its scattered into a few specific areas as @Kristofer Schroedermentioned with 10th and 20th markers and the Crime Map would suggest.