I already have a hauling buisness Arnold's Hauling San Jose / Santa Clara County and it seems that power washing and hauling go hand in hand. I have not pursued it as much as I should beacuse I have a small 13 hp 3.5 gpm cold water unit and to do a really clean and fast surface job it really pays to get a bigger hot water unit with atleast 5 gpm. To answer your question I have found in the hauling buisness I am on a 24/7 advertising campaign door to door, yellow pages, word of mouth, family, freinds, flyers and I found a new one and maybe this will help you get buisness fast.
If you get pizza delivery doorknob advertising hangers deliverd to you. Call them up and ask to speak to the manager. Ask the manager if you share part of the cost for the hangers can you put your advertisement in the back? That way someone else will deliver youre advertising in the neighberhood all you pay for is part of the cost for material.
Hopefully this will help you...Goodluck & God Bless
Arnold
P.S Check out my new commercial
YouTube - Junk Removal