In stead of raising prices I try and get more efficient or quicker. This year we went to a 30" surface cleaner and a 1/2" air pump with a 150psi air compressor for our soft wash system. That allows me to do a 3 story townhome complex that has 12' ceilings without a lift. When I do large jobs like a hotel or large office building or a 2 or 3 acre parking lot I keep track of how many sq feet we can do per hour and I keep trying to improve that number.