Encourage your tenants to use text and email whenever you can for general correspondence.Any legal matters I hire lawyers.

She called a lawyer citing that as long as she paid her rent on time, I could not ask her to leave.  

Talk to a lawyer first. 

WHy dont you ask your lawyer what to do ? 

This attorney can be found through the Ohio State Bar's lawyer referral service.

Young man, I will have you know that my emotional support hippo entitles me to [bla bla bla] and [bla bla bla], and if you refuse to accommodate, then you will be hearing from both my lawyer AND I will  be posting a very critical review to your yelp!"

If it does, you might consider buying your own water meters ($80-$100ish) and installing them, just to see what happens.I am not a lawyer and the following is not legal advice: Even if you can't legally submeter and charge the tenants for actual usage, I'm pretty sure you can install the meters for your own personal entertainment and education, and see how much each unit is using. 

When tenants choose to 'not behave' according to their contract, you should always try to remedy the situation by holding them accountable and then, if the still choose not to cooperate, find a creative way to 'encourage' them to move out and leave the house in good condition, without putting yourself at the mercy of judges and lawyers. 

That might be all you are wanting.A local lawyer is probably a better idea.

Handle the admin, rent collection, bank deposits, accountant, lawyer, etc yourself.Hire a handyman or trade contractors for the repairs and cap ex.Leasing could be you or a realtor.That is how I handle it and how I recommend.Good luck.