I have 4 kids, 9-16 years. I have worked nocs for four years (since graduation) and it has really worked quite well for my family. I also commute an hour each way, so the routine is usually: 9am home, 10am bed, 6pm up-dinner-play-shower, 9pm nap/veg, 10pm leave.
This only works because I have an amazing husband that worked nocs at one time himself. It leaves me available to do doctor, dentist, school meetings, after school programs - and because I have a special needs kid, leaves me available to run to school when she melts down, social services, long-term support, etc...
But... I guard my sleep fiercly and my kids know better than to wake me up
EVERYONE knows that I work nocs and they understand not to call me unless they REALLY need too. I usually sleep with just my cell phone and leave the house phone in downstairs (and only those that I don't mind waking up for have my cell phone number).
But that's how it works for me - good luck.