Also what about the long term impact of becoming a stay at home dad. What I mean by this is if you have decided that you are not going to have any more kids then in 5/10/15 years the need for a stay at home dad will reduce but his ability to obtain employment in his current profession will become more difficult.
Would there be any option to reduce his working week to 3 days / 5 half days / etc as most employers who have had to cut wages might be open to this suggestion to reduce costs. Our creche offer different rates for 2/3/4 days or a full week.
So you might be able to reduce your creche costs, keep hubby in employment & even though the maths may mean that the gain per working day is not great for your hubby, he will have the option to stay in his profession and if he wants to in the future as the children move to secondary school and beyond go back working full time rather than the alternative of perhaps having no job to go back to in 10/15 years?
Personally with only 2 young kids, I would consider minding 3 kids a lot more difficulty and stressful than any job I have had to date!!!!