I have had both a turf tracer HP 48" / 17kaw and a Lazer Z HP 52/23kaw over the past 5 years and recently got out of the business. I was a part timer. I said that I would never again use a regular "residential" mower after seeing the time savings with these commercial but now have only a 21" push for my lawn. I am looking for a small walkbehind for my personal mower. I like the TT HP because of the hydro, but do not like the extra $1200 cost that I have been quoted. I have seen a couple of times where it was mentioned that the hydro may be more dependable with regards to maintenance than the belt drive. Seeing as how this will be used only as a personal mower 15-20 hrs per year, I plan to keep "until the wheels fall off". I would have thought with the additional mechanics involved with the hydro system, it would be more like to have some sort of failure over time that would also prove more costly. Can you explain why the hydro could be considered more dependable than the cheaper and seeingly more basic belt drive system? Thanks!