We have 3 DC, 2 share a room and the other has his own room. We get a lot of clothes & toys from charity shops, or H&M and sell them on ebay when finished with them. They have swimming lessons and do clubs at school. We don't eat out often or buy expensive gadgets/designer clothes, our main spend is food but we still manage to do this relatively cheaply.
I'm a SAHM so this saves on childcare which would be incredibly expensive otherwise, but childcare excluded, AIBU to think DC aren't actually that expensive?