I believe I also detected at least a hint of actual smoker smell underneath.I'm so bummed out because everthing leading up to that day was going great, but as we were looking at the house, I couldn't think of anything else but the fact that the seller was a smoker.I'm now looking at options for smoker remediation, such as scrubbing the hard floors with vinegar, replacing carpet, painting all walls, cleaning or replacing AC duct work, ozone machine, etc.

maybe she will stay there for several more years and you'll be at the point of having to paint and re-carpet anyway. if the ceiling is popcorn, you may have to scrape it off (which isn't hard with vinegar/water in a spray bottle), just test it first for asbestos.

I've seem mention of using bleach, vinegar and peroxide.Any comments would be greatly appreciated.

Fully tiled with 18" tile that has been washed with vinegar water, MOST of the grout scrubbed with vinegar water, some of it win original Dawn included.

I read to turn the water off, duct tape the jet holes under the rim, and then pour vinegar down the overflow tube and let sit over night to see if it will break up any deposits inside and improve the flush.

Lastly, to kill any that are left around the house, you really only need a spray bottle with soapy water or vinegar and water.

I just read that white vinegar kills weeds.

Then put new pad and carpet.If the urine is on the walls, you have to wash them down with a vinegar or odor-neutralizer, preferably one designed specifically for cat urine.If there is urine on the walls, keep in mind it can drip behind the baseboards so you may need to pull those off.I would start with a black light and see if you can narrow down the damaged area or if it's the entire home that requires treatment.

You catch more flies with honey than vinegar. 

If it is over plaster methods spraying vinegar/hot water or fabric softener/hot water are cheaper and easier then anything else to try to get it off first with a scourer and Metal scraper.