Just popping in two cents if you dont mind... I was a nanny for 14 years till I had my own kids. I did it here and o/s,. and still work pt for an old family I looked after, and I get to take my own kids.
There is one huge shortage and that is after school care ( that is what I do for my family ) as it is really hard to get that say 3 hours per night. If you read the calssifieds in you local paper , sometimes they advertise there, or you can go thru a nanny agency, who will take their cut and it wont be able to be cash in hand, and that is generally in the home of the family. Again you can "spread the word" as once you do you will be amazed who is looking for some home help. You will have to have a childrens first aid cert and a police check, and that is more to cover yourself should anything arise, not saying it will but these days you need to cover your back! a Qualified nanny gets somewhere from 18- $25 an hour, night time babysitting is also a good way to get extra cash if you can do it, ie your partner can be at home with yours while you go out to watch someone elses, and they are generally asleep so its easy money , for that you should get around $ 10- $12 an hour and then $1 an hr extra after midnight. Good luck and I hope it goes well for you, but really once tyou spread the word you will be amazed at who will pop out of the woodwork and say they want some one. Also contact your local Child maternal health centre and just ask if you can put up a ad there as you might get some new mums who really need some help!
good luck and I hope you dont mind my opinion!!