How many hours on average do you think I can get out of either a Mini Fastrak, regular Fastrak, or a Fastrak super duty? I want to test the waters in the lawn maintenance industry without spending too much up front, and the mini fastrak is in my price range. Wondering if this is a good machine to start with. I just dont want to have to spend another 6-8k on another mower in a few months if things take off. Thanks.