Craft beer is a no-brainer, so yeah, there would be that. But not a brewery.
I think, like any other business (including the one I have now), if you try to do too much, you're not going to do anything great.
That rules out a brewery, and it rules out BBQ.
I think they're not mutually exclusive... I do agree that if you try to build a brewpub, it's easy to get "lazy" because the beer profit margins help the restaurant stay afloat, while the restaurant helps bring people in the door to drink the beer.
But I think doing the brewery well is just a matter of will. I've been to brewpubs that have either mediocre beer or mediocre food [or both], that somehow manage to stay in business. But I've also been to brewpubs that are top notch on both.
My wife and I had our wedding reception last year at
a brewpub, actually. It's a relatively high-end restaurant that serves outstanding food, specializing in great seafood. Their brewery has won brewpub of the year at the GABF several years, and they have a very good collection of GABF medals. It sounds strange to say we got married at a brewpub, but if you were to ever visit, you'd understand.
Granted, BBQ might be a step too far. Because I'm a perfectionist, and I'd demand it be done right. Which is why, if I did it, I would make it limited and only until sold out. Maybe just doing it on weekends or for big sporting events would work too. If customers knew that on NFL Sunday (which starts at 10 AM on the West Coast) you only served amazing brisket from 11 AM until it's all gone, it would probably drum up business.