[DaveJ|UK]

I don't think PPC will be good for your niche, although a few jobs from 20 clicks sounds pretty good! If you had 3, you're converting at 15%.

I'd guess you charge about £50/hour plus parts... ~£7 per lead isn't much, is it?

However in your business, most of your work should come from word-of-mouth and repeat customers.

If you're just dealing with home users at the moment, try and get into small businesses. You can get a maintenance contract with them, meaning they pay you a fixed amount each month and you do whatever is necessary to keep them up and running. Obviously this doesn't include parts.