you need to work out a few things first
1) how much does everyone else charge in your area
2) Are you going to charge "by the hour" or "x amount to do your whole house"?
3) are you going to use all your own equipment and cleaning products?
4) are you going to go to people who are in or are you expecting them to give you a key?
5) do you have any references?
I have a cleaning lady who started when she was made redundant from her office manager job. She chrges £12 an hour, but she is fast and good, and uses all her own products and equipment (vacuum, broom, mop, polish etc). We checked out her references before we employed her, but for the first few times i was there, then we started leavign a key under the mat, then we gave her our key (it's a real leap of faith to let someone have unrestricted access to your house). She advertised in our local village shop, and in the parish mag. She is completely full. I have no idea as to whether she pays tax and NI but i would think so. As the others have said, insurance is important because she left a tap running once which overflowed the sink and started pourign through the ceiling!