The 34Z will last you a life time
The 34Z versus a home owner ZTR is definitely the way to go. This machine will last a life time doing 1 acre a week.
I bought one for my lawn and because the machine is so good, I decided to get a few accounts and work part time.
One warning - because of its small "foot print" its not good on hills. For relatively flat property it works like a charm. IMO - better cut vs an Exmark I used to have.
If you buy - look at Kawasaki web site and find out how to double your engine warranty.