Find a school with daycare on campus, if at all possible. Usually these are staffed by students in childcare and child development programs, which greatly reduces the cost as compared to regular daycare. One of my good friends had a baby a couple of months ago during her second year of her PhD in Communication. She is making it very well, but her husband has a decent paying job with very regular hours. She also decided from the beginning not to breastfeed, which has made scheduling much, much easier, but she has taken a lot of flack over it. If your husband/parter is a student too, it's going to be really difficult, especially in the financial department.