I have a homestead property and a weekender property. Both have approximately .75/acre of land each. Both have many obstacles. A dealer had recommended mini-fastrak 17/42. I have a 17 hp with at 42 deck tractor. It's very slow. When I purchase this ZTR, I also want the deck to be larger. Is it overkill to get a fastrak 20/52? What is the difference between the mini-fastrak and the fastrak? I was told it was very important to get a ZTR with separate pumps and wheel motors and was told these Hustler models don't have them. Is this true that it's important? How does it impact the longevity of the unit?