I know that their decision making process is fully emotional in that field, along with picking and choosing based on their personal connections with who they serve. 

Tough situation considering emotions involved with another family. 

You should consult an attorney but I believe you do not have to honor a lease with an illegal immigrant.This discussion has taken place before and it gets contentious because people are ruled by emotion rather than facts and law.

One more tip – people remember stories that trigger their emotions.

Don't let emotions and stress ruin a great investment :)

Try to keep all communication in writing so emotions are not involved.

In general, I reckon that if you get EMOTIONALLY attached to a SF primary you want to buy, you WILL spend more on it than is financially optimal, and it WILL hurt your Debt To Income ratio and therefore slow down your ability to buy more bargain multi-plexes at whim.Will your extra retirement income wish, vs your pretty-home desire, be easy to resolve? 

PTSD does NOT require a service dog, but maybe an emotional support PET.

The guys wife seems to be more emotionally stable, because he keep emailing me accusation after accusation saying I'm volatile, have a bad attitude and am defensive, etc. 

Check out Emotional Support Animals & Waivers of "No Pet" Policies: What Does the Law Say?