They have been paying us a minimal amount of rent over the past 2 years, while living in our investment property.My parents' health has been deteriorating and we're planning on having them move in with us, as to have them closer and provide the care they need. 

Sounds like the property was condemned and razed due to health/safety concerns.

I did know about the state's higher taxes, but having on-the-ground input on the business climate is super-valuable.Hot climates are unfortunately out; my girlfriend doesn't do well in them for health reasons.

it was a foreclosure rescue of a 75 year old lady in poor health.. she wanted to live her life out in the home.I paid it off 80k and gave her a life estate.. she lived for 6 years.. by the time I took back over the house was beyond salvage I demod it subdivided it and am building 3 500k specs on it.. so my return on investment will be  well it will be more than 10% per annum by a long margin.. but I am thinkin I am in the business so I can find these kind of situations.. but how does a passive investor find them ?

The Seller may have health problems and needs to cash out to pay bills.

I’m just getting back on my feet after not working for the last year to deal with mental health issues.

That's crazy mang.Now, local businesses are being replaced by health bars, coffee shops, breweries and boutique shops.

Could be as small as a dead battery in a smoke detector in the middle of the night (no guest wants to hear beeping while they are trying to sleep), guests can get rowdy and disturb neighbors, I have even had guests that insisted upon having someone meet them face to face when they arrive.

Yes there is partial exclusion available but you need to meet either employment, health, or unforeseen circumstances.

Ultimately, she took the cash offer because she was in poor health.