Most mowers have a button to push to allow mowing in reverse, some once pushed it stays on so you can continue to reverse without pushing the button again. My neighbor bought a Toro with manual transmission that I used once to more her yard. What a PIA to shift from reverse to forward. Get a hydrostatic drive unit instead of the gearshift models.
Just about any brand of mower will last many years just mowing 2 acre plot. My brother in law used a Craftsman 6500 series for 10 years mowing his 2 acres and it is still running. He did break a deck spindle once by hitting a root but that is all he ever replaced other than one belt.
Last year he bought a new X series JD because he wanted power steering but he was still using the Craftsman most of the time (when he had someone else to drive it).
I prefer the zero turn mowers myself because they are a bit faster than the tractor type plus they are fun to drive.