Babysitter on North Shore,(auck)

Hi there as i am a SAHM and have no intention of leaving the house (well my son) for work i have decided to make being a mum into a bit of a career by offering a sitting service in my home.
i have worked at a kindy and two after school programmes plus i have the first hand experience of being a mum now!
What i'm wondering is should i make a website?
I have advertised at the local supermarket etc but so far only have one booking.
any suggestions welcome thanks for reading my post :)