deciding to be a stay at home mom

When did you and your husband know it was time for you to be a stay at home mom? Aside from finances lining up properly. My husband is taking up a job that's going to require him to travel during the week and I just don't see how I'll be able to work, take care of the house, and the kids without him home sometimes, so I'm thinking of talking to him about me staying home but I worry about putting the pressure on him to be the only one working...