We're also in the process of adopting a 10 year old girl from Eastern Europe who has some medical needs and a genetic condition, but not Down syndrome this time.

He's a smart guy (he has an MBA, MPA and a Doctorate in Finance) that used to work for a commercial bank approving big loans. 

However, the biggest plus to my day job is the medical benefits.

My current roommate is a medically discharged veteran that currently receives his income from 100% disability for unfortunately getting cancer while in service (But he has been clear of it and in remission for years now, THANK GOD!).

Yes it can be come a hazard and health and safety issue and a code compliance issue if city cites you for a problem issue, or someone is allergic gets bitten and needs medical attention, maybe a bigger issue. 

If you have to move for work or medical reasons at less than 2 years residency then you can prorate the gain for the time you lived there.  

Typical reasons are loss of job, reduced income from job or business, divorce, death in family, health issues affecting employment, overuse of credit cards, medical bills. 

Scenarios that easily come to mind:  1) owner moved to nursing home (Nursing home not attaching the house to recoup nursing home costs); 2) owners stopped making payments due to [job loss, sickness, medical bills,....] with hopes of starting back, but time runs out and not enough energy to list house. 

-month-to-month leases with pre-approved sub-leases over the summeror you can target the quiet/too busy students (law, medical, international merit awards, doctorates)

I did not need to be unemployed to find investment opportunities or to manage my investments.I had the best of both worlds, retired early at age 56 with 35 years service a pension and medical coverage.