It is hard to prove/fine for smoking and usually something just talking to the "smoker" will be the best course of action. 

BUT, they ignored the advice because of an anomaly.That being said, even the 80 year old chain smoker could have benefited by NOT smoking, despite being healthy.

is it the same as smoking in a place that allowed smoking, but telling me she was a non-smoker?

The tenants are smokers, have a record, and are possibly getting a dog (through some type of disability program) even though their current lease says 0 pets. 

Not needed if buying for what is owed plus arrears.I've been a landlord for a while and I don't allow smokers or growers of any kind no matter the higher rent.

During the sale, she agreed to a lease.The thing is she's a smoker and I'll ask the people downstairs not to smoke inside.The lease agreement as not yet been signed.Current state of mind : I'll be asking her not to smoke inside.Have you ever lived a similar situation?

My other criteria are non smoker, no cats, dogs with fee, and income 3 times rental, etc.If 600 ish is unreasonable, what numbers do ya'll use?

One thing that drove us both crazy was smokers.

On one hand, the unit is coming off being occupied by smokers, so its not a taj mahal, on the other hand, that level of interest at the price 1 month away from it being available makes me think there's room for an increase.I was thinking about messaging each person and telling them I've had an overwhelming response and will be doing 850 instead of 825.

Some of the things I would like to include. keeping in mind the property is in California.I would rather not rent to smokers but If I must could I charge a smokers fee?