Theres a spread of about 40 miles to the two furthest fields. The bigger issue is that adding wheels means you also have to add lights, and then you have to register every one of them, and the little things continue to add up, where skids and a winch solve it all. When considering that the sheds would only be moved when they had to spray, and even then ONLY on the fields done by air, because the fields done by ground sprayer can be done at night.. making them more mobile doesn't give any advantage, but,, I did try, and was talked out of it.