News media tried the subrenter will be homeless too route (she was unknown to us and not noticed), until they were told that the rent my mom's estate got was $675 a month, so the renters were illegally making money off the subrenterOh, never let a renter stay 30 years! 

One of the tenants has a homeless brother who crashes there and that is the theory (fact) for origin of the bugs.

.-- SebastienPS: I also have some ideas on how to improve the community situation which I put below, I don't pretend to have all solutions, let me know if you think some ideas below are worthy of consideration.The city should offer help and advice and counseling to all new mothers (family planning) and people in real difficulty, eviction or homelessness is a very real difficulty, so is domestic violence.

Let's share ideas and see what develops.You say that you're interested in communities of low cost housingand we've come across 3D printing that can frame small homes for $2,500so we need to figure out where in Oregon this solution fits.Is it tiny $5,000 homes for the homeless?

This behavior by a landlord in the best scenario would result in families being temporarily homeless, and in some cases will result in tenants who is at the end of their deadline to lose their vouchers. 

The overall character of the area is definitely a large factor as it will determine the type of tenants living there/demographics: Yoga/Orange Theory studios, Whole Foods, Starbucks, micro breweries, wine and cheese shops, public parks, bike paths, green spaces, public transportation, good schools, nice restaurants, cranes/new construction, low crime rate, high prices all indicate a Class A area whereas boarded up buildings, lots of Payday lenders/check cashing stores, dollar stores, fast food, liquor stores, homeless shelters, army recruiting centers, addiction recovery centers, industrial areas, dumps, shoes hanging from power lines, junked cars lining the streets, high crime, blight, abandoned buildings, urban decay, burnt out buildings, low prices, low rent, etc. would indicate a Class D area.It's really pretty subjective though, I'm not sure there are universally accepted definitions but rather just people's opinions.

You're probably right to assume that most donors have a CPA but I doubt the 100M renters and half a million homeless in American have access to a CPA, EA, lawyer, etc.So I was looking for some general Bigger Pockets wisdom from actual transactionsbut I'm finding very little nonprofit experience on this platform so far...If you come across any professionals that have actually donated or received real property into a nonprofit in American, PLEASE let me know :)

You will pay much more if something does happen to him, plus you and the kids may be homeless while a court action plays out. 

A good housing provider with a bad tenant goes bankrupt, a good tenant with a bad housing provider goes homeless.

Think of being homeless.