Around here lots of farmers have bunker silos that they cover with plastic, black on one side white on the other, most every farmer has a dumpster just for it and lots of times you can find a 5'(or wider)x30'+ section! This is all I use to cover my stacks, and the snow and ice and rain just run right off it, UV resistant as well, been using the same sheets for 3 years plus at least a year it was on the silo. Take a drive in the country and I'm sure any farmer will let you take much as you want!
I taught my oldest to run the tractor 20 years ago. I promptly took it away from him, it wouldn't have lasted a month the way he was going.