I am looking for a particular type of pressure washer but cannot seem to find one. The one I had recently starting giving out so, I decided to upgrade hopefully you all can offer some help. What I need is a pressure washer that does not need an outlet to run or a direct water supply. I would like to just show up and be ready to go. Preferably a small to medium pressure washer with a tank that can be left inside the van while I bring out the pressure washer.