Goodness, you don't want much, why not have it self-cleaning and able to levitate too LOL
That is a considerable challenge you have set yourself,
even if you have a vehicle to use to pull it and/or are willing to split the thing into two units (a 'house' part, and a run part) that move separately and then dock back together.
If your username means you are in Michigan, the challenge is greater still, because it is real tricky wintering hens in crowded small spaces in cold snowy climates. Even if you only give them 3 sq ft per hen (which IMO is greatly inadequate and has a substantial chance of leading to social problems and will make hygeine and ventilation management verrrry tricky) that still requires that the
house alone be something like 5x6 or 4x8. If you want to give them a more reasonable standard of living and a better chance of getting thru the winter without cannibalism/frostbite you are looking at twice that or more. Which gets to be a biiiiig solid structure to be moving without vehicular help. Plus run, of course.
Remember you will not be able to move the tractor in snowy or muddy weather.
It is not that it *can't* be done, but it is certainly a substantial design challenge (unless I am misunderstanding your username and you actually live in, like, coastal Georgia or San Francisco or something
) and you might want to think about whether it's really teh best route to go. As opposed to perhaps a permanent wintertime coop, with either a permanent run or summer free-ranging or a movable day-tractor for summertime.
Just a thought, good luck, have fun,
Pat