The balance is one that you just work at over time and change up as needed. Just when you think you've got it figured out (or that you're going to break under pressure), something changes (kids get older, different job opportunity, etc.) and you re-shift.
Unfortunately, education doesn't pay well unless you're in adminstration or teaching full-time (and even that's not "well paid" but it's enough to cover daycare, where with the para/part-time jobs it's not unheard of for your sitter to make more then you do after taxes at the end of the day). The challenge with tutoring jobs like someone mentioned below is that those are evenings and weekends and the work is seasonal. I work for a test prep company teaching and tutoring SAT prep. During the busy season, I can be out 3-4 nights a week, a half day or full day on Saturday and maybe even Sunday evenings. At the end of the day it's about $7-10K in extra income a year, which I use to pay for hockey and vacations. The kids hate that I'm not at home, and all of our routines go to hell during a busy season, but it's for their direct benefit so we all grind it out.
Anyway...my husband and I both work FT, I do the part-time seasonal work, and we have 4 school-age kids. It gets hectic, but we get it done.
If you want to put your degrees to work but don't want to get back into a classroom, a related field such as education consulting or working on the curriculum side of the equation (working for a textbook publisher or developing on-line content for home school companies) might be a good career choice. Especially with common core, there is a real opportunity for consultants and textbook/content providers to produce new content that will help districts adopt to the new standards.
Also, all large businesses have in-house learning and development programs where your experience as an educator and writer could be a good fit. Our learning and development staff at my day job often have to write their own content to save money on content licensing, etc. and of course it needs to be delivered in an effective manner, either via in-person classes, on-line instructor-led courses, or interactive self-paced learning modules.
My suggestion would be to keep an open mind about possible careers outside of the classroom that would pay enough to warrant childcare and worry about how to get things done when you need to. Millions of families have two working parents (or a single parent who works FT) and we manage to get things done. You'll figure it out if and when you need to.