So far I've had a tenant die the day after Christmas (a smoker) which cost me $2k to renovate his unit, another tenant sneak people into the house unapproved, constant lies, and the famous one guy always scheming to get out of the rent. 

Today:Health sharing companies are becoming a new kind of painNew art from the 1920s entered the public domainU-Haul gave cigarette smokers a reason to complainNow go have yourself a healthy day.Health care ‘cost sharing’ companies, which don’t guarantee coverage, are on the riseMore than 1m people have joined alternative health care “cost sharing” associations, which offer lower premiums than traditional health insurers -- but no guarantees they will actually provide coverage.These nonprofit organizations, typically affiliated with religious groups, are growing due to demand from desperate consumers.

Phone screening includes number of people, pets, income, when can they take possession, smokers, and criminal history.

A high quality air filter will do better but if they are smokers or have pets the 3 month time frame can need replacement every 4 to 6 weeks instead.What happens is the air filter catches more stuff it then starts restricting the air flow.This also causes the bill to go up.You can use the cheap blue filters but they need monthly replacement.2.When was the last time the duct lines and vents were cleaned??

What else can I do to get good matches (non-smokers, employed, no pets, etc.)?

I was under the impression smokers were not a protected class.

To most low income tenants beer and cigarettes make more financial sense than 120$ a year renters insurance

If it's full of cigarette butts, empty cans and food wrappers; that's how they'll leave your house when the job is done. 

You can have an entire police dept. run after smokers all day or target the source to cure the problem.

He also smokes cigarettes.