Its such a shame that a great sustainability project is ruined by some weird drive to "recycle" something stupid like tires. Just buy the effing bricks, have a construction company do it, have a factory safely recycle the tyres, and we can all save the environment. It strikes me as a very, for lack of a better term, misguided "hippy" commune kinda thing.
Yeah, and it will never get approved in any of the 10,000 zoning districts in the US. You should grab a random township zoning PDF and read the entire thing before even thinking about building something under 1600 sq ft, and that doesn't use materials from your local building supplier.