Spreading Yourself Too Thin by Sal Alfano Over the Thanksgiving holiday, I visited friends who recently had some renovations done. An open porch that adjoined the kitchen and bordered a swimming pool was enclosed, using lots of glass and a tile floor, to produce a large, comfortable sunspace. The contractor they hired had worked for them before, but his circumstances had changed. For the earlier work, he arrived with a couple of helpers but performed much of the work himself. This time, it was a bit different. His business was expanding, and he had just landed a contract for a large project out of state. But he assured my friends that little had changed and that, while he couldn't actually perform the work