"making housing more affordable" means start to spread, meaning leaving big dense cities where real estate value is absurdly high, to build a distributed population were LAND value depend much more on the local land characteristics (a safe place for flooding, landslides and so on or not, an easy accessible land or not, ...) than human structure around and is a substantial part of the house price. This means build new, well insulated, ventilated homes with p.v. for all reasonable latitude, and so on.<p>Like it or not big cities have a future of big ghettos for poor and desperate and the real estate value there will surely drop retargeted to mere local human exploitability index (or hum much you can milk from the desperate before they start looking for you without friendly and civil intents).<p>Personally I left the big city for a nice mountain area where I built a new home, unfortunately for me my parents (who start to be a bit elder) do not want even if they can economically leave the city, so I'll suffer indirectly the easy foreseeable high entertainment costs of city classic buildings (at least here in EU, where most buildings are terribly designed and for another era) then the big drop of real estate value (plus taxes who will NOT drop) but I've NOTHING against that, it's simply a fact any rational human see if he/she do not want to be blind, the point is that if we start debating and moving slowly with public support we can transform the inevitable storm in an opportunity, otherwise it will be just another 1929-alike crisis probably covered by a concomitant global war.