So you want to renovate your retail space. But you worry about the one-two punch of closing the store (interrupting your revenue stream) while construction costs pile up. Not to mention the mental and emotional havoc a revamp can wreak on you and your staff.If you’ve been planning for a full or partial store overhaul, you’ve likely been saving up—and, perhaps, girding yourself for the inevitable setbacks and complications. Rest assured, however, that you can redo your shop without losing your marbles—or your shirt.Hire the Right PeopleKatie Hoffman, project coordinator for Pinnacle Contracting Inc., whose portfolio includes St. Louis’ Simons Jewelers and Buy Buy Baby stores, says the best way to find contractors anywhere is word-of-mouth. Barring a recommendation, “talk to local architects, because they work with general contractors,” she says. “And contact the local unio