alt Hacker News> If you aren't a slave to your car, you likely live in a walkable area where the cost of a 4-bedroom apartment or house is going to be pretty high.
Or you're one of the millions of people who live in developing countries which have low cost of living and low housing costs. Coincidentally this group has very high birth rates.
Also, socially conservative, multi-generational households (sharing labour and childcare between women relatives), less expectation for mothers of young kids to be away from the home, and a much lower expectation of what "housing" means in terms of both building quality and the amount of living space per person.