California is a whole other level of insanity for everything. NYC/DC prices and bureaucracy along with the busybody veto power of suburbia.
Still expensive.
Here’s the cheapest kit at Menards if you’d like to compare:
29551 - Tahoe Cabin Material List at Menards https://www.menards.com/main/p-1569392867885.htm
And that’s materials only. And would be considered quite small by US standards.
But hey 11% rebate.
It’s even cheaper if you do the laying yourself of course.
So yeah, concrete pouring is way cheaper.
Wood also maxes out at some point, and even poured concrete - which is why the tallest skyscrapers are glass on steel.
https://reasonstobecheerful.world/the-age-of-the-wood-skyscr...
https://www.youtube.com/watch?v=I32sMNktmKo
Unfortunately for most Americans who are building a house, a primary concern is the eventual sale, and anything that is not the standard house is a harder sell.
Which means that if you're willing to stray from the beaten path you can find some deals, and some disasters.