I have 3 acres that are flat with almost no obstacles. Much of it is rather rough so I end up mowing it a slow pace. This has me thinking that a ZTR will not cut a significant amount of time from my weekly mowing since I will not be able to go very fast with it either. This just my theory since I have not tried a ZTR on my property yet. I am currently using a 60 inch rear finish mower on a Kioti CK20H but I am considering a John Deere 757.