My wife and myself just bought a new house. Will have just under 4 acres of grass to cut. I think i want to get some ZTC with about a 60 inch deck. Main problem i'm having is do i buy a commercial series or a home series mower? I may possibly try to mow a neighbor or two's grass as well if there up for paying me enough? My main concern is buying something that will last for many years to come and will be a good investment vs paying someone year after year to cut my grass. Suggestions on what to buy please???