This is realy simple. Get 3 or 4 round fence post and lay them on the ground 3 to 4 feet apart. Slide the coop up on the posts and use the posts as rollers. You should be able to pull it several feet at a time with the lawn tractor simply by taking the rearmost "roller" and moving it to the front as you progress. It may take a little time, but you should be able to move your coop even if the ground is uneven in places. When it's all over with, you still have 4 fence posts that you can use for the run. No waste.
Beers y'all,
Ken
Beers y'all,
Ken