Once you have determined what your monthly expenses will be if you stay home, subtract these from the monthly take home pay of the working spouse. If not, you will need to find ways to make up the difference. This can be done in a variety of ways. Your current employer may allow you to work from home. You may also want to consider providing daycare to one family, or a part-time job a couple nights a week.
Fear is a great motivator.
Use it to make staying at home work for you. Scott Danger is a C.P.A. with ten years' accounting experience.