Hi all, I have been approached to clean the exterior of a large building at a retail park and having to put a quote together. We have done a few exterior buildings before but not on this scale. The work has to be done out of normal hours with no access to water the size of the area is 1350sqm of walls and cladding + some windows. I know what I am doing cleaning wise and the approach to take but stuck on the pricing side. We do normally charge by sqm or set piece for normal jobs but when I price this up usual way it's coming in at a big price as in they could replace the cladding for that but I don't want to go in to cheap as I could earn more doing my normal jobs. This is job I want as it could lead to doing more for this company and be on a contract any ideas please would be helpfull