I guess there is no status/designation other that ONLY one primary and ONLY - ALL other are absolutely investment?

If it’s in the case of household safety and health then you have a legitimate case and they would accept to hear it and make that exception. 

They'd blame their helpers, their health, whatever. 

First stop, call your local health department or whomever oversees environmental permitting.

As mentioned above check into the health of association and if any rental restrictions.

@Chris HowieTry a health savings account and have it make more passive income to cover your health care.

A suit could be brought by the tenant, but on the off chance that it would ever happen, it would more likely, that an injured tenants health insurance policy holder would be the one to attempt to recover medical costs by filing suit. 

(rent, taxes, health insurance, etc.)3.

That makes sense with the change in income type with real estate professional status. 

Also, The One Thing by Gary Keller I would read before Millionaire Real Estate Agent because unless you can focus on your one thing you will not get to millionaire status.