I dont care if they are smoking crack or meth, go do it outside. 

PS Rochester and Buffalo were ground zero for much of this stuff also there were groups buying those homes for 10k packaging them up and selling them for 80k to investors from England. the city / state finally cracked down on that and there was some folks that got in trouble on the criminal side of it.. you can google it.. wont mention names but you can find it if you dig deep enoughBut this is nothing new.. buying hood rates for pennies and selling them for dollars to foreigners and unsuspecting out of state folks. 

The best defense against rats entering your property is to seal off all entry points (holes, cracks in walls), remove food sources (dirty dishes, food left in trash cans), and water sources (like leaks). 

Lastly the real estate agencies and FTC and state AG's are really starting in earnest to finally crack down on Wholesaling the latest article on We BUY ugly HOUSES brought it to light in a big way..

Crack down on both, this creates nothing but problems.

Just a case in point, the tiny apartment I live in (800 square feet) the mortgage payment is about 4000 per month, and the typical rent for such a place would probably be somewhere between 1500 to 2000 per month.

But if you're willing to take a tiny leap of faith, I think the returns are solid, the diligence and the integrity are there, and the states/markets/submarkets and the asset class are thumbs-up.

I bought 10 crack shacks out of state in the last year in Nowhere, Arkansas.

Detached: A separate structure like a tiny house, guest house, or mother in-law suite in the backyard.2.

It had some good architectural features that people loved, and the original plaster walls downstairs were in great condition, not even cracked.