There is a solution for everything no matter what you encounter when selling or buying a home. $495.00 + GST will get you a 2-day ozone treatment on your home to rid it of pet and or smoke odours. There are remediation companies ready to help you or offer to do it yourself. I found a company in Calgary that sells/rents everything you need.
Paint that covers up all the smoking/tar/tobacco and seals it, you can even do the ceilings. Starting at $196.00 for a 5-gallon bucket. Acts like a primer for you to paint the walls any colour you wish afterwards. *recommend washing walls first TSP*
As your Realtor, I leave no stone unturned to find a solution and options for my clients.
I've researched and found Trades People, Companies and products to help you every step of the way.