Here is a website for an affordable, green community on Lopez Island WA.
This is an 'in depth' site that goes into the vision, planning, design, construction, operation and cost of creating and living in the community of 'Common Ground'. It is probably as good a manifestation of the habitat component of the Kingdom as I've ever come across. If you're inclined to start a commune, talk to these people!
Below are 3 links to information about the Tiny House lifestyle, you can 'Google' many more.