A contractor in Arizona doubled his size in his second year and a contractor in Cincinnati doubled his output in a single year. One guy in Illinois had so many calls he couldn't handle them, so he had to cancel the number. I sold the number to one of his competitors who has the same problem but is better equipped to handle it.
These 1-800 numbers make your phone ring. It's up to each contractor to sell the work, but the more calls you get the more work you have a chance at.