I use the two bucket method but I really have to since I have the raven fr-s and basically if I sneeze on the car it leaves swirls. if I were you with no driveway, i'd just use the power wash stations but just stay away from the giant brush lol.
read here in this section to really learn how to do things properly but i'll still hit up a touchless automatic wash every once in a while while I'm lazy
http://www.ft86club.com/forums/forumdisplay.php?f=42