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

Same with grills, and tiki torches.I don't have any clauses in my lease agreement to prohibit any of this explicitly, but I have a clause that prohibits any action that may invalidate or increase my insurance - which allows me to not allow fire pits, bounce houses, trampolines, above ground pools etc...But recently I have had to send out various notices asking tenants to remove tiki torches and fire pits. 

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.

Sure you can arrest each smoker when caught, charge them with possession etc... but whats the grand effect in thwarting the problem?

So, that $60K person is living in a house with a $1,500 house payment, $200-$300 in utilities, a $100+ cell phone bill, $200 in food at home, but another $200-300 eating out, a $500 car payment, Full package Directv at $180 per month, drinking starbucks coffee at $5 a cup that they pick up on the way to work....and the list goes on.Not any one of the items listed seem unreasonable, but combined with the salary to support that kind of lifestyle is excessive for that person, making them live outside of their means.I was at my annual holiday lunch with one of my attorneys.. and we got on the coffee habit... not to mention smoking habit at 7 to 10 bucks a day.. but in Portlandia were coffee is a thing.. she said many of her staff ride down the elevator buy the fancy 5 buck coffee and do it 2 to 3 times a day 5 days a week.. that's a 200 to 300  a month coffee habit right there.. smokers 300 a month  drinkers etc etc..  

Super nice guy to me, but clearly had some serious criminal history and I know was a cocaine user and pot smoker while I was there.

Limit your time around smokers and if you drink--be careful.

Do not and I repeat do not go into with some spiel about you being an investor and grilling her with questions.. build rapport, find the motivation first.