Carol, what you want to charge and what guys are willing to pay for your services could be poles apart.
You have to be realistic re what you are offering and what it is worth. I would put a search into the AW search engine of all the things you are going to offer and where you are and see who is charging what in your area for the same.
If you are charging way over the odds you are going to cut down on your possible bookings, for if guys can get the same services for say 60 GBP cheaper than you are charging then there are not many going to book you. Some of the guys may be willing to pay what you want to charge but others just want to shove their poker in the fire irrespective of the surroundings.