I made what we jokingly called "The Cube" for my chickens out of hardware cloth and PVC pipe. But since I figured they didn't need much vertical space, I made it only about 2 feet tall. The chickens loved it, but I've hated it. It's hard to get into to fill up water, get eggs, etc. As I was chatting with my college student son (who happens to be majoring in mechanical engineering), he gave me a bunch of ideas for starting over. I sighed and said it was going to be hard, since he had been the one to make the coop (and did a fantastic job) and now he's halfway across the country and that means I'll have to do it myself, and I just didn't feel like it. I had resigned myself to an inconvenient tractor for the backyard. My son thought a moment, and then said, "Well, with a 5-foot high fence around the backyard, the only real predators in the daytime are the hawks overhead, right? Well, why don't you...just use a tent?" He went on to say, if I cut out most of the bottom and replaced it with mesh so the chickens could get to the grass underneath, I could get in and out easily. And an old catbox full of straw would do for a nesting box (put on a crate to make it higher). Well, I am a lousy carpenter, but I can pretty much sew anything. I cut out the bottom of a cheap tent (giving myself a nice tarp for another use) and tacked on the netting (vinyl version of chicken wire, sort of). The chickens love it, I love it, and no more crouching and squatting to deal with! And with the window covers all unzipped, they have decent sunshine but not too much. The chickens go out in the morning and then I herd them back to the coop at night. I know this won't be feasible for a lot of people, but I wanted to share it. It's easy to move around (just pull up the little stakes and drag it where I want it and push down the stakes again) and cheap as can be.