You can so do it. I am married with four children the oldest is 8 and I just had the youngest 3 weeks ago. It is hard I wont lie to you, but it can be done.
During the day it is all about the kids. I get my oldest off to school and she is there until 2ish, my 4 yr old is in pre-school from 12-3 and that left me with my then youngest 3 yr old and I was pregnant so that baby was easy.
I would study while my oldest two were at school and the youngest was sleeping. I am now out of school and taking the summer off.
After I picked the kids up from school I went back to it being all about the kids, and then after there were in bed and I had my shower it was around 9 so I would study until 11 or later. I however did have the bonus that if I needed time to study my husband could work or stay home from work and let me go and study. I have taken all my pre-reqs except for A&P II, so far I have a 3.28 it is not the best but it is good.
Good luck you can do it, you just need to find out what works for you. I would suggest taken the easier classes the first semester so you can find what works best for you. Also if they offer any online and you think you would be on top of your work then this is a great way to take classes. I loved taking my classes online, most of the tests were at school but it was nice that I could log on any time that I was free and work instead of leaving sick kids behind to go to class.