But, you'd be amazed at how someone supposedly broke finds money for new cars and cigarettes and the casino, etc.  

We don't smoke cigarettes. 

I lived with my mother and brother next door and we caused way more wear and tear as a pissed off teen, bored child, and a smoker.

Smokers?

I had a Section 8 tenant who smoked something in the bedroom (whether it was marijuana, cigarettes or something else, I don't know) and two of the walls had what looked to be watery light-colored tar running down the wall and so smoking does cause damage. 

Again whatever you feel comfortable with in terms of escalation here.No personal experience with this device and not sponsored, but I've looked into FreshAir Sensor previously for my Airbnb, and it is a simple plug and play device that detects cigarette smoke.

I clearly did have that part in my paperwork that one could not smoke in or on the property, and I saw massive butts on my porch and charred black marks where she put out her cigarettes on my cedar shake siding.

My units are almost done for showings but not quite.Give me a flexible and tolerant, seasoned and stable non-smoker that works nearby any day of the week.

Our nightmare tenant also resulted in other tenant complaints, cops being called for noise, parking crazy in the parking lot taking up two spaces, destroyed carpets where they let cigarettes fall and burn on the carpet (and smoking wasn't allowed), her baby daddy moved in almost immediately - it can result in lots of time dealing with complaints and problems and I almost lost good tenants, too, who I had to assure I was getting rid of the nightmare tenants.  

They also have a lot more drunks and pot smokers, domestic issues, drug use, etc.