I recently bought the Harbor Freight 2500 PSI Gas Powered Pressure Washer – Item #62201 — The cost along with 2 fifty foot length heavy duty garden hoses was about $300. It worked well and I am very happy with it. I washed a number of trailers in my park and made a few bucks.
Features include a 4 HP (160cc) Predator Engine, 2.4 GPM flow rate, Five high-pressure quick-connect tips, and a soap tank and Chemical/detergent injector on pump.
Link to Pressure Washer: http://goo.gl/6NMM2L
A comparable Power Washer on Amazon: http://amzn.to/1Q6aZ1Y
Extra set of Nozzles: http://amzn.to/1PDkn2l