The seller told me the woman renting it has a grown daughter that has bipolar disorder and damages the house.

I served my community as an Allstate Agent for over 28 years before being struck with Fibromyalgia and cognitive disorder.  

Hehe, Good one...I found this one and thought it was hilarious...Disorder in the Court...The following is a true exchange from Attorney/Witness questioning...

Even if the record owners have lost interest, due to relocation, drugs/alcohol, other disorders, incarceration or death, neighbors and community government people and secured creditor "people" care. 

So, if you (your tenant living in the tiny house) don't have a dog that bites neighbors, or mental disorder that has you getting into fist fights with your neighbors (either would invoke the "direct threat" exception to the Fair Housing Act), you can basically do WHATEVER THE HELL YOU WANT, as long as it's "reasonable" to the DISABILITY involved. 

If I had to choose metaphors, I would actually go with Bi-Polar vs Depression.

I probably have a little compulsive disorder of some kind, whatever I get into I just go at it 24/7, eat, sleep, walk and talk it, as a way of life.

I have to say, the heavy snorer may have a sleep disorder.

These people aren't zombies that are sobing and crying or have a disorder that will make them sell the house for less.

@Russell NaylorYou'll want to look into a couple of things...The Veterans Administration has a supportive housing initiative to promote housing veterans near where they get treatment for injuries and psychological disorders as a result of their service, or near public transit which can help them get to their sources of treatment.