You’re not going to solve the housing crisis with single family homes in suburbs. You need to build dense, walkable cities with good public transportation, and with residential and commercial space mixed together instead of separated. For that, prefab apartments work the best by far, not some giant 3D printer. The USSR and China figured this out ages ago.
Let’s 3D print even more houses so instead of having 3 vacant houses per homeless person we get up to 5