New carpet/flooring, repaint everything including the kitchen and bathroom cabinets, remove any wallpaper and replace drapes worked on my house that had heavy cigarette odor and yellowing.

Here's a quote from Google on search topic "ozone removes odors":An ozone generator will not only remove pet odors but other troublesome odors caused by mold and mildew, fire, water damage and others.

The test for bacteria is a coliform test, unless you are guessing high bacteria because of sulfide odors.

There are sprays that reduce seal wood to burn odor,,,looks rather whitish or gray in color.

We mopped the slab and walls with  white vinegar, gallons of it, several times, to neutralize the odor, then washed everything down with TSP, then used original Kilz over the worst areas. 

House Rules: In the event that the premises are in a building containing more than one unit, Lessee agrees to abide by any and all house rules, whether promulgated before or after the execution hereof, including, but not limited to, rules with respect to noise, odors, disposal of refuse, pets, parking, and use of common areas.7.

In a recent case, no one thought to tell me about the horrible odor of the carpet (which had been cleaned already supposedly) till 3 wks into a listing, and presto my PM finally mentions it only because one of the people who rejected the house actually mentioned it, so we got a new cleaner to focus on the smell.

MF gets a lot of complaints about noise, odors, smoking/pet violations, parking issues, someone not cleaning up after themselves in the laundry room, etc.There are benefits to each and it depends on whether you are looking at it from the view of cash-flow or work-load.

What about the wood floors, if I have then redone, will that encapsulate the odor?

https://www.homedepot.com/p/OdoBan-5-Oz-One-Shot-Fire-Odor-Bomb-Fogger-9705A62-5A/202560684