Also, being a drug dealer, I was concerned for my family's safety if things got ugly.

The students use drugs and their dealer carries a gun and it went from coke to crack to whatever they use to kill themselves these days.

Mike Williams Shawn Torsitano I don't think not wanting to rent to someone because of their line of work is illegal if so then drug dealers could go all breaking bad in your rentals and no one wouldHave any recourse.

I have never had arrears of rent with any of our tenants, but I have had a drug dealer.

She's not a drug dealer, but she is receiving a very large divorce settlement, has no income, will be going to nursing school. 

It's not such a big deal to rent to lower income people, just make sure you don't rent to lower class people.Lower income = not having a lot of moneyLower class = liars, drug users/dealers, questionable morals, lack of respectThere are lower income people that have a high amount of class just as there can be more wealthy people that are lower class.Lower income and lower class people can come in any color. 

Turned out to be a drug dealer...

Kicking on the door and/or adjacent window until a tenant or resident drug dealer opens the door for you was pretty much the only way to gain access.

Unfortunately with drug dealers, they are most likely not going to stop, but they may try to be a little more discrete which hopefully buys you a little more time. 

Even though I wanted her to stay because she paid on time, I found her to be very demanding (she did all sorts of bizarre things like claim the neighbors were drug dealers, stalking their activities, hassling others in the community, continuous repairs - I have other properties and no one is as high maintenance as her) and I was upset at the state of my newly rehabbed place.