My Kabota L2900 tractor has served me well. At first I used mostly a 5" rotary motor & Ag tires on the original very rough terrain. I then bought a BEFCO 6" finishing mower and replaced the AG tires with turf tires, to mow the improved fields. After 15 years and I think about 1700 hrs on the tractor my finishing mower is about rusted out. My property is part of an old 100 acre pony farm, maybe half of it in reclaimed open fields/grass and 1/4 in open woods that I am clearing and leveling for park use. Some of my neighbors have asked me to mow another 3-4 acres for them (part of the same fields I have. I have been looking at ZTR, "Commercial grade" mowers 60". My favorite so far is a Bad Boy 6000 Lightning Z (26hp Kawasaki LC, liquid cooled). My local tractor/Landscaping vendor sells only the Bad Boys for ZTR's. I move large loads of wood chips with the loader on the tractor regularly. I have a sign up that I will take all wood chips, sometimes I get a load a day or even several. I use the chips to make paths and spread them in rough areas that the dogs tend to wear the grass off of. I am thinking that I might use the tractor, which has a 5" loader strictly for landscaping purposes and retire it from mowing. Our park has some 70+ members and most days there are from a few up to 20 people and their dogs wandering around playing in the fields, creek & woods. I would like a mower that is much quieter and less invasive for those who are trying to enjoy the natural sylvan environment. I would also like to be using a mower that does not beat me to a pulp by the end of a full day of mowing. I have more than I can get done most of the time so saving time becomes very important too. We envision grass areas much like a golf course but in an even more natural low lands, large creek valley, environment. Should a 60" gas ZTR, with liquid cooled engine, fill this role? I am also thinking about a diesel motor, but my fields are becoming flat and easy to mow, except for all the sticks the dogs drag/carry around. There are still some places where the terrain is relatively rough, but I tend to cover those in wood chips and flatten them as they rot. Thanks for any & all ideas, suggestions.