this reminds me a lot of the portable chicken coop that pollan wrote about in his book "omnivore's dilemma" - which is a book that has had an INCREDIBLE impact in the way i want to live.
he has an excerpt on this website here:
http://michaelpollan.com/articles-archive/sustaining-vision/
i am loving your posts on perma-principles. thank you for taking the time to do them!