DH and I are trying to decide whether to switch to much lower paying jobs. It would be hard to switch back. Right now, with young kids, we could afford it. But we aren't sure how that will change as the kids grow. So we are trying to make a list of costs for the next few decades.
Obviously there is:
Mortgage/rent
Utility bills
Then:
Nursery fees
School supplies and trips
After school childcare
Holiday childcare
Extra-curricular activities
University
What are we missing?