Ok. So.....I'm planning on adding about 16 more raised beds to my garden this year. I currently have 4. They are 8' x 4'. With that in mind. I'm planning on planting at least 10 of them for us and having the others on rotation. The plan is to keep 2-3 hens (serama, seabright or silkies....small, quiet birds) in the tractor to till and fertilize the beds that we are not using. If we put the tractor onto our patio during the winter (possibly bringing the birds inside for the winter). How often would you rotate the tractor on the beds?