For affording a house in fiat land, lobbying for better zoning can be very helpful. A lot of residential zoning is actually illegal to build anything bigger than single family housing.

However, the people who live in that single family housing will fight tooth and nail against your efforts. So good luck with that.

Having said that, the fact that housing is unaffordable even in uninhabited areas is pretty dumb. Most of the United States is pretty empty and yet....maybe some lobbying success can be found there?

Otherwise, you could do what everyone seems to enjoy doing these days. Move to a country that's just cheaper, however, in doing so, the people that live there may experience unaffordable housing as a result.

Whatever community you end up in, try to take care of your people rather than spiting them selfishly as is the case most of the time.