I also noticed on the second walk through that 3 of the apartments had active smokers in them (one of those being marijuana). 

The house was owned by a smoker in the past and we replaced with new carpet and hired ozone treatment company to clean up AC system to remove the smoke smell before moving in, but it didn’t work very well and house still smells.

I didn’t notice there was not a rule against no smoking and had to smell cigarettes through the wall until her lease expired. 

When we bought the property we made it a point to go introduce ourselves, explain what we are doing with the property, and exchanged info telling them to call us ASAP if there is ever an issue. 2 things that happened the first month of renting were people throwing Beach towels over the fence to dry and ppl throwing cigarettes into his yard.

I have requirements of 650+ credit score, income =3.5X rent, no smokers, and while I've gotten tons of interest, I haven't found the perfect tenant yet. 

The renter was a heavy smoker.

Let them know your basic qualifications like verifiable income that is 3x the rent or greater, no criminal history, no pets, no smokers, Landlord references for the past two years.

. $1,000 +$660 appraisal -$2,500 Agent fee) I am a licensed FL realtor (only 3 months)Income: 3 units Unit A - $500/m - Smells like cigarette smoke and the tenant has a dog, has carpet that I think will have to goUnit B - $500/m - Very strong urine smellUnit C- $500/m - no weird smells- All 3 units had some drywall issues, needed paint and have outdated electrical panels.

Stole this one from Mindy...Originally posted by @Mindy Jensen:"...when I was a smoker, I also 'didn't smoke inside' until it got super cold outside, then all bets were off.

Mid 20th century saw a cigarette company hire a marketing demon that convinced the women of that time that smoking cigarettes made them independent and glamorous, doubling their profits.