Economics is hard to argue with, but your self-concept has less to do with the needs of your family and more about your emotional needs. After you decide why you want to work at home, you must decide what you gain and what you will lose. I have been able to establish a pretty good routine since I only have one child. Now that my company is placing more demands on my time I have to be careful to keep my self-defined priorities in place. You lose control of time when you work at home.
Every parent knows that their child has a schedule, a routine that has been developed over time.
Starting a new business will initially disrupt that rhythm. Eventually you and your kids will adapt to the new routine but you have to remember that your kids are job number one. When push comes to shove, you will find yourself working late into the night and during the weekend when your spouse is home and can help with the childcare. No matter what time you go to bed after a long night, you are up when the kids get up. This is only an inconvenience when it happens occasionally, but over a long period of time, the effects are more long-lasting.