Craig Singleton is a do-it-yourself guy. "I like self-sustenance, DIY," he says. "Mom and Dad are that way." So Singleton brews beer, hunts, fishes, barbecues and cures his own meats. He's both passionate and enthusiastic, traits that sometimes earn people the label "nerd" or "geek" -- but in a professional setting often result in well-served customers. That's Singleton's hope for Brew 'n Q, his new homebrew and barbecue-supply store that opened this month in a warehouse space in rapidly developing River North neighborhood.