I can relate - I am 41 and have five young children, age eight and under, and am going to be restarting my RPN studies this September. As much as I would have liked to do a two year BScN degree, it is a financial and logistical luxury that we can't afford with so many little ones needing care and attention. So my plan is to do the RPN and, if it is feasible and feels worth it, bridge to the BScN over the course of three or four years. And if I can do that, then I would love to become a pediatric NP by the time I'm 50 :).
I wish you luck with your venture into nursing and think you are doing the right thing to balance school and family.