Kids are VERY EXPENSIVE. If you're about to have kids, don't do the math. Stop reading this now. Now, of course, the calculations are unique to each person/family, but you get the idea...
We played "stay at home" and the opportunity cost of having a parent at home was high. For some of the time, we had BOTH at home. Ugh. My quick calculation on that shows the costs at probably $600,000 conservatively. Daycare would have been cheaper, but we chose to spend the extra money because we're a family fortunate enough to be able to. Many have no choice.
Feeding, clothing and on and on. Ouch. No idea. A lot.
Arts and sports and other activities/education? We're big spenders here, at least $5K a year, some years more. This year it's going to be over $10K easily. There's lots of ways to minimize these costs, but it's a big deal to us, so this budget line is high on the priority list.
Education will be $$ if your kid is thinking law or medicine or something like that. Even regular post secondary ain't cheap. My own progeny has mapped out a career path that so far looks to have course/exam bills of around $60-70K - cheaper than med school I think, but still a lot. Luckily it's spaced out over 7-10 years so that helps ease the pain.
Worth it? That's an individual decision. To us, still worth at 10x the actual cost.
Back on the topic. A friend of mine's husband is in the oil patch. He's lucky in that his job is in refining and he's still well employed. But, many of his friends are on hard times right now. One poor guy he knows is trying to unload his massively modded F350 and having no luck. The kicker? It's worth maybe $40K and somehow, in some incredible way, he owes nearly $110,000 on it.
An upside down lifetime achievement award?