I'm a bit new so exuse my illknowledge... I'm going to go into the business of mobile detailing this summer however I need a ball park figure of what kind of pressure washer to start off with? I was thinking 3,000 PSI would be enough? If not then what is? Also what would be a good brand to look into while staying relatively cheap? How much will a decent pressure washer run me? Also where can I get a water storage tank to carry around in a truck and feed the pressure washer? Thanks in advanced...