I completed my first power wash job this morning. 3 walls of a vinyl siding house and a 10 x 10 concrete patio slab. It took me 1.5 hours and I charged $125. I had to rent the equipment for $45. I came out OK as far as money. I took this job to see if I wanted to persue the addition of power washing to my company. I must say that I enjoyed it and will look more into adding it. Once I get more experience, I can see the profit margin rising greatly. I think it will be a great addition to my biz.