I am thinking of using a trailer frame and building coop on low (approx 6x16) trailer. Then it could be towed easily to various sites around 6 acres. It would also be off the ground, predator proofed and the door for chickens could open to the ramp to the ground. The run would be moved separately and attached each time to fittings on the coop and trailer frame which would basically be the foundation of the coop. Kind of like a large house trailer for chickens? Hey, what about just converting a mobile home and making it a mobile chicken home? Someone must have done that. What are pros and cons?