The handcrafted arms and skids make it easier to move around. We use good materials, 3" exterior deck screws for all structural parts, hardware cloth (1/2" mesh), and high grade stains (with the nice cedar tint) to protect the whole building. You might want to check them out at our website. There are some short videos about our brand new chicken coops, and one showing how you can easily winterize them. $699- 5' H, 4' W, 4' L http://www.ranch-coop.com/A-shippable-4x4.html $799- 5' H, 4' W, 6' L http://www.ranch-coop.com/4x6-and-5-feet-tall-chicken-coop.html $1580- 5' H, 4' W, 10' L http://www.ranch-coop.com/large-chicken-coop-.html Call us if you have any questions. Thanks!