I've been concerned the manager is going to significantly increase the rent at some point, at which point I'll have to figure out whether to stay or go, although it's likely that the new amount would still be less than if they had raised the rent a little bit every year. 

I live and invest in Johnson County, it's basically South Fort Worth as far as competition is concerned (high competition).  

The concern we had is he did not pay a security deposit when he moved in 3 yrs prior.

Another concern is ceiling height. 

Our concern is that they have only paid for two guests but will be using the house for a large group.

I wouldn’t be too concerned with fixing windows if you are going to rent it out.

You're welcome, Yafei, but I'm slightly concerned about your definition of the tenants giving you a "headache."   

Or whose such a stickler for time he freaks out if I'm a couple min late for our call (finishing up w prospect was no excuse as far as he was concerned "Our relationship is more important than 10 prospects" whatever the fvck THAT'S supposed to mean) and then makes me 45 min late when i was scheduled to be 15 min early for my first appointment to sign a seller up, messing with his computer when I could have had them done in no time, but woudn't let me- that's a mental issue.I did not sign up for military training.

My concern is possible expansive clay at this particular site.

You don't need to spend a lot of money getting a lawyer involved at this point, because there are steps you can take right now without needing one.If you are concerned about your tenant's physical well-being, you can have the local sheriff do a wellness check.