people are just getting hung up on the $ amounts, being "rich" when you have a family is about providing opportunity for your children and that shit costs money.
it starts with security/safety which means the basics: mortgage, safe and reliable cars + contingency planning ($1M + life insurance) should something happen to you + planning for your own wealth let alone that of your children.
it goes on to enrichment/education, it means having a house near work, for most people that means in the city. Why? Because spending those extra 2 hours a day with your child, playing with them, reading with them, helping them with homework (instead of wasting your time in traffic) for the first 5-6 years is a 1000x more valuable than some patch of grass in the suburbs.
Is your kid particularly gifted or interested in something? Can you afford to support them in that?
Does your child struggle? Can you afford the tuttors and extra help, or are you going to be waiting years on some waiting list begging for mediocre government help?
+ Private school, unless you want to gamble on your child not getting stuck with some dbag child in their class in public school.
What about those life experiences that help shape their character when they're older, can you afford those?
If you're of a certain mentality/ school of thought there's a bracket of income where any incremental income is invested directly in your children. (i'd say 150-250k)