Not putting a 2nd DC through nursery would save us probably 15-20k. We could use that money on holidays, future support for DC when they reach the point of buying a house, learning to drive and going to university if that’s what they choose to do. We have a very small family though - only one sibling between me and DH and we are very low contact. That’s just how it is. Because of this firsthand experience we know siblings are no guarantee, but in the same way not having one means they will never have relatives of close age to them nor nieces, nephews or in laws. Unsure if this reason alone means it’s better to have two…?