Wow, MammaD, you've got a full life and you're managing. Good for you. I also have children and am thinking hard about how to manage a move to a new city, my studies, research, family time and everything else. If I'm accepted anywhere, I know I will be older than everyone else in my cohort (but hopefully not by too much!) I honestly can say that as an older student, I feel much more grounded, with a better grasp of what is important and what's not important in life. I've learned to let petty things slide, and focus on the important things. I don't care that much about what people think of me, but I am very committed to my work and will give grad school my all.
(Just to be clear, I'm not saying that all older students are more grounded than younger ones. I'm saying that I'm more grounded than a younger version of myself.)
During a Skype call with a POI, she mentioned her kids and husband, and she also asked about how my husband felt about moving to another city. It was a big relief to hear her ask about family.
I agree that being in school can be a good time to start a family - yes, you'll be very busy, but you will likely be able to connect with other young parents on campus to share resources and get tips on childcare etc.