So i'm 17 and have been mowing since my freshman year in high school. Right now I have a Toro self propelled mower that does a nice job, and I have 5 lawns a week which brings me $180 a week @ about $30 an hour. If I keep going at this rate, I want to have about 10 jobs a week this summer. so about $350 a week. But recently i've been thinking of really expanding my work. I don't have enough money to buy a real commercial mower, and was wondering if a used residential zero-turn mower would be a good invenstment to make? Ones that are about 3 or 4 years old are going for about $1000 in the classifieds. I figure with one of these I can mow, trim, and clean up a lawn in about half an hour and make somewhere around 80 bucks an hour doing so. But at the same time, I have to find about 15 more jobs, pay off the $1500 or so that I will need for the mower and trailer, and have a used mower on my hands that might possibly need repair. I really need to be making more money than I am for college, but I don't want to make a big mistake that will just drain most of my savings. Any comments? advice? oh and how do you get a 42" mower into a fenced in backyard?