Just come back from a window cleaning festival and spoke to a few people. I currently just do traditional on bunglows, but want to expand to make more money. I dont quite want to get a van yet as I just do this on Saturdays and it will be P/T for awhile. Someone told me to get a small RO system in my small shed then carry this water to a 125 litre container in my boot (or pump it) then use a pump from my boot to the poles for when I do the cleaning. Does this sound better than using just the DI on trolleys or water from a RO on trolleys which are stored on my car's back seat? I heard the trolleys are a pain. Please advise?