I'm going through school now as a mom to toddlers. The amount of free time you have at any given point depends on how the program is structured. In my first two semesters I was able to continue working and still had a reasonable amount of time to spend with family. Now that I'm in my third semester, working is out of the question. Aside from class time, I'm easily averaging 45-55 hours every week in just studying. Every weekday I leave my house while the rest of my family is still sleeping, and by the time I get home it's already time to put the kids to bed. On weekends I spend most of my time at the library studying to be away from distractions. I haven't even started clinicals yet (I'm in a front-loaded program, so our clinicals don't start until next semester). We start with two clinical days a week, which gradually increases to five days a week before we graduate. Some programs require that students rotate through distant clinical sites, often for weeks or more at a time. So it depends on how much "free time" to spend with your family you consider to be sufficient, because added up these things don't leave much left over.
When it comes to family time, what I lack in quantity I try to make up for in quality. But none of this is easy, especially the times when the kids cry when they see me leave for the day or whenever I miss one of their milestones. I went into this willing to make those sacrifices if that's what it took, but I could never fault those who decide that having to make those sacrifices isn't the right choice for them or their family. Good luck in whatever you decide.