We use park pro 16's on our campsite, to do the fiddly bits. its excellent if the grass is maintained and for doing precise work (under caravans, odd shaped areas, etc,) and the 4wd system on them is excellent, however they do kind of encourage you to take the piss (45 degree banks, putting the deck under bushes where there's crap) which there not built for.
The engines are good and the deck is fairly easy to work on, my only complaint is that parts for fairly regular things, like hydraulic oil and rear deck wheels seem to be mental money.
we've had 2 over the last 15 years, with the last one being traded in due to a gearbox problem, it was about 8 years old, and we don't look after our machines as well as we ought too....
So that's my take, that doing a 10 acre site hilly site once a week. Also if you've got the option the power steering is worth it, you can drive the thing with you finger.
