I am concerned for our health and our quality of life in this unit. 

Clean bill of health(no cavities). 

The property, which was always a second home, is no longer owner-occupied, owners admitted to their motivation for selling being their age and health (they are in their late 70s).

Greetings BPI hope everyone is doing well, i have a dilemma that id like your opinion on,Please feel free to ask as much detail you need to understand the situation.Here we go, Currently my mother is renting an apartment for 900/month in Westland Michigan and i pay half the rent 450 to help, my name is on the lease she couldnt be approved without me , since she moved to the apartment, i bought a duplex 5months after she moved in the apartment, and since then she we renewed her lease.My duplex is currently rented with outgoing tenants, i live on the other side, currenlty my renter are paying 775, but once they move on ill rehab and raise the rents to 900, which would put me at cash flow of 200 a month which is great to live in one half ,imagine if i completely moved out.So heres the Dilemma, theres a Hud house on the market for 60K which will be worth 150K after a 30K rehab, but i cant sell it or rent it for a year after owning it, so i was thinking i could move out my duplex move my mother in and sell my HUD after a Year for the profit.

Of course do this only if family does not step in and you have contacted them yourself.Explain to all the nusicance calls to 911 for emergency assistance and you could inform police if this type of incident repeats itself maybe then should send out an ambulance for transport for mental health evaluation..could be person if off meds, but this behavior is not normal, average, and is beyond you call as to discipline. unless he starts yelling, or causing disturbance which you should make notes of.. 

With higher end flips, the market health controls your destiny... so be careful.

I have a dilemma which I think fits this thread.

Hello BP,I'm in a bit of a dilemma.

We immediately notified the developer only to learn that he had some serious health issues and is not contactable.  

You could call the city health inspector out and ask for his help in working with this tenant.