Canada

For many places, this could cut to costs of a lot down where places are allowing lot splitting. I've noticed its common for a family to build a smaller house in the backyard, where zoning laws allow it, so that their kids/parents/in-laws/best friend can live there.

Is it as great as having your own lot? Probably not but it would cut down a lot of costs, keeps you close to family and beats the hell out of living in the basement instead.

You're thinking a bit one dimensionally.

Locally produced also means local jobs (with the spinoff spending that comes with more people having better jobs).

And means building the local infrastructure and skill base to sell your products to other places.

No matter what it costs, it is cheaper than what we are doing now, and housing is built in days instead of years.

Instead of asking questions use your commenting device on a search engine and tell us the breakdown on pricing.

First Nations' housing is paid for by the federal gov't. As such no person living on rez land owns their own home (with a few exceptions).