Only you know your own comfort zone when it comes to finances. Sometimes the stress of budgeting is much worse than having the extra time with your kids, as horrible as that sounds. Other people are more stressed about getting home only in time to eat, do homewoark, bathe and get the kids to bed. They feel they aren't able to spend enough quality time with the child once they are home and that stresses them even more.
Know this, a lot of women work 8-5+ and they have great relationships with their kids and spend quality time with them and are very happy. Sometimes your house won't get clean or you'll have to have take out or do a lot of frozen meals to save on cooking time, but there are shortcuts to things that would take away time from your kids. The more organized you are, the better that all works out usually. Also, you could use some of the extra income to hire a housekeeper to come in twice a month so you wouldn't have to worry about the deep cleaning if you decided to work more.
My mom worked two jobs as a single parent when I was a child until I was 9 years old. I don't remember ever feeling neglected or unhappy because she had a great caregiver for me and when we were together, we had a lot of wonderful quality time and she always made things fun. I'm sure she was worn out but I can't remember a single time where she made me feel like hanging out with me was a burden or that she'd rather be doing something else. Not only that, but she was an immaculate housekeeper and a gourmet cook. I to this day don't know how she did it. I'm certainly not my mother's daughter when it comes to stuff like that. ;-)
You asked specifically about homework and I can say kindergarten homework is not usually all that time consuming. In fact, homework wasn't time consuming for my daughter until 2nd grade, and even then, you're talking like 30-40 minutes. I know as they get older, it takes more time, but if you plan well, you usually have time to help with homework and play with your other kids. In our house, bath time is fun-time so even though that's a chore, we count that as quality time cause the kids love it and we try to make it fun.
Being home with your kids is definitely a blessing if you can do it in my opinion. If I didn't get to work out of my house, I can't say that I wouldn't quit to be home more with my kids 'cause I don't think I could handle the commute or working in an office since I've been working at home for so long. But you have to ask yourself which would stress you out more. Not having the extra money and putting a temporary hold on any career advancement to be at home more with your kids? Or having more money, possibly advancing your career, but spending less time at home?
Only you know what your comfort levels are and what will truly make you happy. Good luck on making the right call! :-)