I want a "fat bike" for riding in the winter. (Fat bikes have extra wide tires for traction on the snow.) The problem is that they're all $400+ !!! I just spent $400 on a bike, $350 on a hitch, and $250 on a bike rack!

Maybe I'll have enough money by the time winter starts

But $400 is ridiculous. I want to pay $200 at most because I know it's going to get all salty and sandy. It's going to get corroded, so I don't want anything expensive