If you have a lot of kids, after a certain age, the older ones can start to help around depending on age. It's how humanity survives in self-sufficient conditions.

For serial kid rearing families there is a plateau in difficulty, and then a steady decline (depending on the personality and health of the kids of course).

I don't think it makes me busy. It does.

> You think kids are taking up all your time? They have more kids and volunteer at the school, and run a church group, etc.

I'm not counting extremely-optional stuff.

> The clock is secondary because using time efficiently, planning, and classifying which hours you are awake and available are all skills.

Money puts this on extremely-easy mode, because for a huge variety of things "this is a problem that will take much time and attention" becomes "just pay someone to make it go away". I know, because I have enough money that sometimes I can do this (I didn't always, and I didn't grow up that way) and holy god, it makes life so incredibly easy when I can.