Dear James: A tree fell and damaged some gutters, but I should replace them all. I plan to have the gutters professionally made, but I will install them myself. Do you have any advice? —Greg R. Dear Greg: You can typically save about 50 percent of the total cost by installing the gutters yourself. The material cost for the downspouts, hangers, and other hardware as well as having the gutters roll formed will be about two dollars per foot. Standard hand tools should be adequate for this project. It is not difficult to find gutter installers who will custom make the gutters to the exact lengths and shapes you need. Their gutter sheet metal is in long rolls, and they form it at your house. They should also be able to sell all the other parts you need and may be willing to give you some planning advice if you …