And this doesn't even address the risks they take coming to this country, like the women and children that are sexually abused or trafficked, the men that are killed, the drugs that are hauled over, etc.2. 

Must be the drugs.  

The area is a rougher area (low-income, Class 3 city about 40 min outside downtown Pittsburgh, many drugs in the area, etc.) - but the other units have great tenants who take care of the place, are quiet, etc.

At the time we received an offer from a reputable short term drug and alcohol rehab facility who operates out of SFHs in LA to rent the entire property at above market rates.

High crime, drug house next to us.  

Tax shelter schemes, partnerships with foreign partners and accounts, partnerships with hundreds of members, returns with blatant mistakes, entities in questionable businesses, like gambling, drugs, online video sales, escort services.

Sharing understandings and rules on guests, cleanliness, chores, pets, drinking, drugs, boundaries, house identity, conflict resolution, communication platforms, etc.

Illegal immigrants or white drug addicts / felons.

Think 10-12% CAP rates.D class areas= Practically no price appreciation, worst/struggling public schools, highest crime rates (especially drugs and violent crime), highest cash flow.

Negligent forest management, drug addicts, or illegals?