I would not purchase anything from a smoke home. However, lots of the ladies have given you good advice. Just be upfront about it and there are others that also have smoke/pet homes that would purchase.
I have had problems with the row/round robins in my guild. I had to take the blocks outside for awhile until I was able to work on them, then back in the bag and my car trunk until time to exchange.
Needless to say, the row/round I added was a simple one and quick to attach.
Jean