I have a roommate who smokes. However, I make him smoke outside, so at least it helps reduce the smell in the house. Sure, it still gets on his clothes and such, but at least it doesn't permeate. And, hate to say it, but I'm not *that* concerned about the value of the house. It's pretty much a tear-down special, as most of the value is in the land it sits on.
Anyway, I at least try to save him a little money. He'll usually buy cigs one pack at a time, paying $7+ each. But, on my way to work, there's a gas station that sells his brand for about $64.13 per carton, with taxes. So, I'll pick up a carton when I gas up, and he reimburses me. So, that saves him a little bit. And, if I ever go out of state to where they're cheaper, I'll pick some up. Virginia in particular is a lot cheaper, often by about $20 per carton compared to Maryland.
I hate the fact that he smokes though, and I'm glad I never picked up the habit. My grandparents on my Dad's side of the family used to smoke like chimneys back in the old days...until the Surgeon General's warning first came out around 1958 or whenever. Granddad says that, once that started making the news, it took him and Grandmom about 3 days to kick the habit. Of course, in those days, cigarettes didn't have all the addictive chemicals and such that they do today, so maybe it was easier?
And, Grandad's still kicking, at the age of 98 now. So, even though he had been smoking for decades, it appears he got lucky, with regards to long-term damage.
Unfortunately, my other Granddad, on my Mom's side of the family, wasn't so lucky. Grew up on a tobacco farm, started smoking when he was around 5 or 6. Always worked around pesticides and chemicals during his career, plus working on cars back in the days they used to have asbestos in brake shoes and such. Plus, getting gas, oil, and other fluids on you probably isn't so great in the long run. Drove a dynamite truck during WWII, as well as a mechanic, and again exposed to Lord-knows-what. And smoked the whole time through.
He was diagnosed with lung cancer when he was 73. They opened him up to see if they could remove the lung, but at that point it had spread through his lymph nodes, and it was too late, so they just slapped him back together. He was dead less than 5 months later.