> Those places would have to build an impossible number of houses to affect demand.If houses were able to be built freely then everyone would be able to build a house... Except, if you can't afford a used house, you most definitely cannot afford a new one. As before, time and materials are the real killer. The used housing market is merely a reflection of the cost to build new. Same reason used cars have risen so high in price in recent years: Because new cars have even higher prices.
> You have people saying they can't afford housing and then, when you show them they can, they say, "not there..."
The trouble is that you confuse affordability with sticker price. I technically could live in that house for six months before I have to return back to my home country, but I could not legally work during that time. It is far more affordable to pay significantly higher prices in my country for a house and work all year long. The price of that house is low, but the cost is very high.
The places everyone wants to live are the places everyone wants to live because they are the most affordable places to live. If it were cheaper to move somewhere else, the people would have moved there already. Humans love to chase a good deal and carve out an advantage for themselves. However, a low price doesn't mean cheaper.