Building an entirely new city from scratch in Northern California: an environmentally friendly way of providing more housing, according to some silicon valley types

Sure, why attempt to improve the climate resilience or affordable housing in the cities where millions of people already live, when you can just buy land upstate and get a whole new toy to play with? And why tell local, state or national government anything - they'll only be supplying the land, water, sewerage, utilities & transport links. You pay your taxes, you deserve to get something back.

This is going to be one hell of a planning application. What's the land use code for "feudal stronghold"?