60% of new single family home housing was manufactured, not built.

It is hard not to feel like the affordable housing crisis is an entirely government manufactured issue, to the extent that it is indeed an issue.  Bad monetary policy (inflation) compounded by bad zoning practices, and further compounded by construction industry and manufacturing regulation have all created an entirely predictable problem.

The solution, of course, is to fix policy and demonstrate regulatory and monetary competence.  As is entirely predictable, the preferred solution is to take from the middle-class and give to the poor and to vested financial interests.

From Biden’s New Housing Plan: Fire Up the House Factories by Kriston Capps.

Manufactured homes briefly dominated the U.S. housing market during the 1960s. By 1972, these homes — not just mobile homes but small-scale modular houses — accounted for some 60% of all new single-family homes produced nationwide, according to census data. That number has diminished so much that the role of factories in building affordable housing has gone all but forgotten.

The Biden administration wants to put America’s house factories — those used to be a thing, really — back to work. A new housing plan by the White House offers a set of actions designed to close the nation’s massive affordability gap. Among its proposals are steps that would lower costs for manufactured homes by expanding financing options. It would also ease barriers around approvals and construction. One notorious regulation that could go up for review is a longstanding rule that manufactured homes must be delivered with a chassis still attached, even if the homes are built in place permanently. It’s an under-the-radar regulatory tweak that could make a big difference for those most in need.

Increase competition, get rid of sweet-heart regulations, respect past zoning commitments, and accelerate and lighten the regulatory burden - there's much of the problem solved.  And mostly by improved market function.

Getting government to quit subsidizing demand and restricting supply and many social problems go away.