There are going be times you get smoked and you want to just cry but it just taught you a lesson of what not to do next time.....As @Bob Floss II and @Jeff Burdick mentioned I'll look to sell the property ASAP.Dont listen to these other people such wholesalers(who normally give incorrect ARVs) and have a really experienced realtor provide for you solid tight sold comps.

He smokes and has the hallway smelling like sweat.

@Alyssa Hammond buy every smoking deal auction property you can find with cash!

Tenants are told to stay away from 3 sides of the house and no smoking on property.  

Smoking occurs inside my rental unit.

Agree will Declare our Buildings a low Allergen Buildings in all future leases after remediation of units, Currently i have a fourplex with a No Pets, No Smoking Standard in all leases.

@Deangelo MackMost cities will do a walkthrough inspection yearly to be sure it’s habitable and has smoke detectors and so fourth .

Even if you stand outside while she signs the form, you can sniff for cigarette smoke or cat pee and  listen for undisclosed dogs or occupants. 

However, I have not completed disaster restoration work and I am mostly concerned about smoke damage. 

I've been to many fire damaged properties, and aside from the physical damage caused by fire, you have the smell of smoke to deal with, and that may include the contents, cabinets, walls, floor, window frames, etc.