I used to get tenants going to the university there (Ohio Northern) but thathas dried up. 

We have a tenant who moved her boyfriend, which abuses her and damaged the apartment, big human-shaped hole in dry wall, broken window blast, and she ran away.

Giant piles of dog hair even though we're not pet friendly. 

Our market is dry and I have been looking over three year but I don't want to make bad decision.

If things stay the way as they are up here, I might have to change my cross hairs and give you some competition!

They ran dehumidifiers and fans for a few days until it was dried up. 

It can be some dry reading but that's where you will find the most accurate information regarding landlord/tenant laws and even those are not always immediately updated to reflect the most recent changes so you still have to be careful. 

Such as clogging the sinks (hair and grease) and letting the shower and sinks overflow to the point where the ceiling in bathroom on in the unit below collapsed from all of the water. 

You will need to plug the holes with filler or putty (or just leave them) and possibly re-poly the floor.I've also heard of people spreading talcum or baby powder on the floor and working it into the cracks of the floor to act as a dry lubricant and reduce squeaking. 

My wife drives across town for her hair appointment because the person listens to her.