I'm trying to decide between a 10-15 y.o. rangewing with a few issues that I think I can get for less than $5,000 and a new 72" Super Z at twice that much. I have 5-6 acres to mow with about 4 of it fairly wide open. The ground is flat and smooth to semi-rough where the moles have gotten ahead of me. My goal is to shorten my mowing time from my existing 30 y.o. ZTR (60") that seems to go 4-5mph without breaking the bank. If I get the 340, what should I count on for yearly maintenance and repairs to something that age? Are there features/models I should avoid? Would I be buying a project? I drove the SuperZ - what a machine! The issue for me is cost. Thanks!