re: Topic for younger couples (30-35)

It is possible, but I don't think it's reasonable for at least 75% of the <35 population (75 percentile salary is $85,000 for age 35) unless you own your home outright. If your home was inherited, gifted, or you were able to pay it off prior to having kids, then that $2000/month goes a long way for cash flow and breathing room. After that, you're saving on childcare and likely eating out less since the SAH parent should be cooking.

If you bought your home in the past 3-4 years. Almost a guarantee that both parents are working.