If you earn enough yourself, then yeah you can let your wife stay at home and take care of the kids, and I am a progressive person, so I believe, if we have a woman who makes a lot, even husband could stay at home and take care of the home and kids too. So I am fine with one person staying at home, IF we have the other make enough.
In this era? you better think twice.
I would rather to work and consume all of my monthly check to hire a housekeeper and nanny instead of becoming a househusband.
Today, if men can't give money or stay at home, most people will look them as a failed husband. You can stay at home, but make sure you brings money or you work outside even you didn't earn enough.