Our (Canadian) version of Harbor freight carries some smallish pneumatic Turf Tires, with a flatter edge and tread? Or you could look into small (kids sized) ATV/4wheeler/golf Cart tires. Especially with how you’re considering trailering it. Maybe not a daily mover, but it’s still nice to have the mobility, and a good solid predator proof “coop” in a tractor. It looks great!