I gathered that he only lives in it while traveling, like a teeny tiny RV. He says he used something similar for a trip to Burning Man. But I don't see how he and his wife could both sleep in it, unless they slept in shifts!
I haven't gone through everything on his site, but he did post a few pics of the accommodation he designed for his non-heat-tolerant wife at Burning Man, which is more like a teepee/pyramid made out of rigid foamboard. He also designed the adjacent yellow vehicle made from coroplast for tooling around Burning Man.