I am jsut starting my lawn care business and have had alot of request for power washing. I also have a friend who is a Supervisor for a builder and mentioned to me that he always needs a pressure washer. I've been thinking of purchasing one to expand the service I offer but was wondering how to go about pricing pressure washing service. Is it done by the Sq ft or what. Any help would be appreciated to help me with some figuring to see if this is something i want to add to my offerings.