I am 16 and have been in lawn care for a couple years. Currently I'm using two walk behinds, 48" and a 62"with a sulky. I'm wanting two buy a new Hustler Rider (52"cut) to take the place of my 62" mower. The Fastrak seems to be a realy nice unit but I have not yet looked at a Mini Z. Would the Fastrak be ok for light commercial use or is it strictly a homeowner unit? Would it be worth it to a 16 year old to spend more money and buy the commercial Mini?