I think your best bet is to search around at the different styles and decide what you want to build. The A-frame designs look cool but are poor roosting, coop space for your birds. There are many pics here by clicking on coops, members have designs on their pages, there was a recent coop contest though few tractors. I have one on my home page though I made the coop too big for easy moving. Grabing the tricycle wheels this spring once it's time to move around again.