This is a great idea. I like that the run fits over your garden bed and is sized to match. Easy bed clean up. I'm a little hazy on how each side is opened/closed when the run is moved to another spot on the 'wheel'.
Large chicken tractors are really heavy and it seems like this design took that into consideration. Very attractive and well thought out with the removable run. It would be nice to see some more detailed pictures like how you hinged your nest box lid with the metal roofing.