How many forward's and back's with the plow? How many multiple storms doing that when its 30 degrees or less in a ATV seat? Clutch, that shifter bearing, core purpose of ATV? Quoting Sundaydriver "It's not really about the machines power, it's more about, tires, plow blade size and set angle, machine weight"
I don't think I want to invest those dollars, or depend on a ATV to get out. I think I'd rather spend dollars to equip the truck. If the op has property in Northern Maine buy an old truck with a plow and keep it in the woods uninsured/unregistered.