The best advice I could give any Mum is to work from home while your little ones are still young. All you need to do is set up a little office space with your computer and printer and away you go.
It's great to be your own boss, work your own hours and also spend time with the children and watch them grow.
A few tips to find work - Contact your local Universities and Research Departments, as they are always looking for affordable typists/office people to type up their research data/resumes/assignments. You could even put an ad on their public notice board and in the local newspaper, this comes in very handy for local work.
So what are you waiting for, get busy and have fun.