You could go door to door, and ask people if they need the leaves cleaned out of their gutters. Of course, you will need a ladder, or a damn good vertical jump to get on the roof. For a small, 2000 sq. ft. house, you could charge twenty or thirty bucks, and it will take you about thirty minutes or so. Find ten of these, and there you go. $200.00 – $300.00 in half a day.