Do it. :) I am a stay at home mom. I have been for 10 yrs. To help out from time to time I did consulting work or kept someone's infant. The stress of working and being a fulltime mom are too much and is a strain on the marriage. My youngest is 4, soon to be 5 and next year I have plans to go back to work, teaching. Your wife can do the same. Just clean up your bills, while she is working bankroll as much as you can. But the rewards for your family life will be worth it all. Best wishes.
Many thanks for the encouragement.