This is something that I've been thinking about for a long time. My dad has always wanted to have his own resturaunt, and I always thought it would be fun to do with him, and maybe my brother as well. It wasn't always a BBQ joint, but that's what I'd want to do now (originally we just thought about all kinds of things - a "this would be great" kind of thing).
He's now in a position where he could probably do it financially, though I don't know if he'd want to work that much anymore, lol. I am not, but between his experience in the food biz, money, and my work ethic, ability to smoke some good food, etc., I think we could make it work if he was into it. The only thing that would scare me away, is that we'd do it in the KC area (where he lives, I'm from, it's just home, and he doesn't want to leave, and quite frankly I'd like to move back). That isn't necessarily the most forgiving BBQ market, and there's a lot of competition.
I hope if you do it, you're successful, man. Fear (and not having the $$ myself) is what's holding me back right now. Let me know how you're experience goes!