The tenant smoked weed, partied and trashed my place, the turn over cost is around $6000.

Seems like an odd time to go dark on a thread he was so active in.

Smoked.4.

Others drink, smoke, and don't try to help themselves in any way.

More like I .. am  done... and now need a shower as I smoke my cigarette in bed.

It does say I have a right to a reasonable determination of violation of length of stay and guest may be barred from premises by notice from landlord if violating laws, HOA rules or lease terms (like smoking). 

We turned a dark dingy home in a bright and airy coastal oasis.

Otherwise you are just throwing darts in the dark and probably making a really bad decision.

There is already a nest doorbell and smoke detector.  

I'm debating buying a 3 unit where the existing tenant in the top unit clearly smokes in the unit (cigarette in ash tray in listing photo).