I have 3 kids. I earn a decent wage but nothing excessive and my wife doesn't work (she looks after the kids). We live in a city, don't own a car and walk or bike most places.
They don't cost that much more if you're willing to be sensible (each kid doesn't need a TV and a games console or even their own bedroom). We're very moderate on how we spend our money - we don't blow thousands at Christmas just to give kids tat they won't play with, we keep clothes and re-use them as the younger kids grow up. We eat at home as a family, don't take extravagant holidays etc etc.
They don't cost that much more if you're willing to be sensible (each kid doesn't need a TV and a games console or even their own bedroom). We're very moderate on how we spend our money - we don't blow thousands at Christmas just to give kids tat they won't play with, we keep clothes and re-use them as the younger kids grow up. We eat at home as a family, don't take extravagant holidays etc etc.