Need to buy a pressure washer for my house. Mostly to clean the brick walkways and concrete around the pool. Is this one adequate for basic home use? Is it powerful enough to clean the walkways? http://www.powertoolsinc.com/cart/index.php?p=product&id=202&parent=67 (The reason I picked this one is b/c I can get it free with some of my AMEX reward points, but don't want to get it if it sucks) Thanks in advance.