I got a couple little leaks during Sandy. They seem to be coming around the fireplace and my furnace pipe. Assuming it's small shingle repairs or just caulking/flashing repairs, how much should I expect to pay for the repair? I normally like to get a few estimates and go from there, but most companies have a few weeks' wait for just estimates, and repairs at least a month from then. However, one company can come much sooner, and I don't have any basis for comparing their estimate.