Earlier quoted context omitted.
Partner choice and choice whether to have children are other critical considerations in cost control.
Kids are not that expensive. You do not have to send them to college, you just have to love them, teach them, care for them. Sure you will have to buy more food, and you might need a bigger house/apartment.
Editing to say that kids are not too expensive if they're healthy. If you have children who have medical conditions, then all bets are off. What really pisses me off is the local school district always begging for money. I pay those thieves almost over $5000 year in property tax, since we live in an area with ridiculous property taxes. Whenever I've visited the school and my children have also seen this, they beg for school supplies, but the closets in all of my kid's classrooms are brimming with supplies. They spend more on sports than they do on education, which really irks me. Sports may be important, but nowhere near as education. 1% of 1% go on to play pro sports, but here they act as if sports are more important. Classes are let out early to watch games, yet the school district where we live is a poor performer academically. My own children are fine, but that's because we watch and are involved.