A UK project called Ekinoid aims to produce free/open plans for spherical houses that perch on poles seven feet off the ground. The goal is a house that can be built in a week.
Ekinoid homes will be designed to be as easy as is pratically possible to fabricate (ideally using no expert knowledge or skills), house a family of three/four, and will take under one week to build. Ideally, the main structure should last over 100 years (and then be recycled). Build each town using unskilled labour.
All parts of an Ekinoid home will be designed to suit the local climate and terrain, and will be delivered on-site for fabrication. We think one crane (possibly two) and a team of approximately four people (one skilled, three unskilled) would be adequate for the one-week construction of each house; and after, these newly-skilled people (the new owners) might then help to build more Ekinoid homes, and train new owners. This training would, in principle, work exponentially and would therefore service the whole new community in a very short time.
All the land under the houses would remain useful and accessible.