From our experience in the US, the birth is nothing compared to the financial drain of the other expenses. And at this age, childcare dwarfs all the other child-related expenses.
We have great insurance and don't rely on family for childcare though, so the math is very very different for someone with "free" familial childcare and no/lousy insurance...
No I'm pretty sure Strictly Ballroom is a completely accurate portrayal of ballroom dancing.