There has been issue with Tenant B smoking near Tenant A's apartment(The entrance to the upstairs is right next to the other apartment window.

How about purchasing a single family home with extra square footage, creating a private entrance for a room, and doing the house hacking method this way?

It should have probably sold for way more then asking, but I got a strong offer in and accepted fast before anyone else could move it seems.http://www.century21.com/property/14217-frenchtown...Honestly, I don't know the rental market that well out there, but knew it was a good deal at $185k, with two nice houses on it, really nice lot with views and great landscaping, separate driveways and entrances to the 2 houses (but one lot no potential to split).I'm thinking I can get something like $2300-$2500 per month, for the two houses combined, but that's a definite guess.....I really don't know the market that well.At that rent, it's a good buy at $185k.But I just got an offer for $220k....and think I might be able to work that to $230k....with no realtors commissions. 

They usually post them at the entrance and exits. 

Entrance into partnerships, multifamily, and out of state investing.

your entrance costs have to be astronomical...your are closing multiple loans every acquisition, right?

I stumbled across a single family house with a mother in law suite with outdoor entrance, kitchen, bathroom only 10 minutes after being listed on Zillow. 

You'd need to get security cams at entrance and issue temporary codes.

Get cameras in all of the common areas and near the entrance points that they end up using.  

When I first bought the place the walk out basement entrance was under a 13 ft by 13 ft three season porch, that sat on pillers that was added before many years before I bought this place so I decided to box the area underneath it and make it an additional room for the basement, I figured I may as well since I already have a roof for the add on, that being the floor of the three season porch right above it.