Build cheaper housing farther outside of town where the land is cheaper and provide a bullet train to transport people into the expensive land areas. It might take time for the train to be built, but these areas have had decades to solve the problem while frittering away trying to build a few, token, and small small low cost housing projects. There really is no other solution for many areas like San Fran and New York … the land is simply not there and displacement of current landowners is expensive, impractical, and ineffective.

They need to bite the bullet … train … or some other effectively fast transport.