Build more houses then
It’s going to take decades to get out of the system we’ve built for ourselves with sprawl and the automobile. Until it’s possible to build in volume and cheaply you won’t see prices go down because there so much pent up demand.
One more innocent question: Should our state build enough houses just for existing population or for all South America population too?
Building more SFH on the peripheries is fine for people who want that, but it's not part of the solution to lowering prices.