Cheap Diy Dog Kennel . Another simple yet effective design is a crate kennel. The floor should be at least 100mm off the ground to allow air circulation and to. Outdoor Dog Pen Ideas Examples and Forms from www.lisbonlx.com The key to making it cheap is finding materials that are durable yet inexpensive, like. This gives the fence a place to sit level. Place one post in each of the holes, and fill the holes with wet concrete.