It seems to me that many people equate money earnt per hour running a business, i.e. £60 per hour charged to a customer with a salary or hourly rate of £60. It ain't so, once you have paid all of your business running costs how much is left? And don't forget to include taxes, NI, Marketing, Insurance, Fuel, Chemicals, Machine repairs/replacement, Van and the list goes on. And that assumes as many have pointed out, do you get £60 or £30 per hour all day every day. What about holidays and god forbid sick?
If a customer is happy to pay, make sure you do a good job, deliver a good service. If you do she will tell her friends and cost will not be an issue. Do a poor job and she will tell everyone and will still not be the issue.
Nigel