Quote from @Samuel Mutschler: This is mental illness, substance abuse, or someone trying to get out of their lease.I would tell them the rental is unsafe and they should leave.

Money means nothing without your health, time, and family to enjoy.

I was recently involved in a thread where the OP was almost radical in her dedication to her short-term $savings at the expense of long term gain, and yet was bemoaning having had a mentally unstable tenant turn vicious on her.If you "face the beast" you must expect to be battered mercilessly at some point.

I’m in the health care field and I used to work for the 2 hospitals in Springfield IL.

I also have a one-page Mold Policy that explains how we will move forward if they insist mold is present or impacting their health.

My usual lendor has the health issue and can no longer fund it. 

Is he mentally disabled ?  

Simple solution: Inform them that unfortunately you can’t accept ESA letters without being able to verify the validity of the letter by speaking with the local licensed mental health professional who prescribed them their ESA, so that you can verify that they have a legitimate disability requiring an ESA as well as that whoever prescribed it to them is a real licensed mental health professional who has an ongoing relationship with them beyond just receiving a one-time payment to “prescribe” the ESA. 

Report each issue on a separate ticket (grass, trash, health hazards, etc).

For our clients, we separate repairs into catergories: 1) Health & Saftey - highest priority to avoid lawsuits2) Property Preservation - don't want a $500 water leak repair to become a $5k repair later3) Government Required - for city & S8 inspections4) Marketing Negative Impact - who wants to rent a "purple" house?