Well, if the answer is everyone has to become a hippy then housing can already be cheap. Go live in a commune. I don't think this issue is about cars and homes

Well, if the answer is everyone has to become a hippy then housing can already be cheap. Go live in a commune. I don't think this issue is about cars and homes making people happy per se. I think the key here was "average home" not some completely unrealistic societal change that I sure wouldn't want any part of.