What feels right? A close relative who made a different home and career choice than I did gave me the best advice I've ever heard: When the time comes to decide, you'll know.
There is no right or wrong answer, and choosing one over the other doesn't make you a better or worse mother. Your decision doesn't have to be final; it just needs to work for your family right now. Talk to your partner; work through the planning, number crunching and soul searching; then sit with your thoughts for a while and go with what's in your heart.