I have got the lawn work pretty much standardized, but am having a hard time pricing tree trimming. I quote a price and it either takes me a lot longer than I think or a much shorter time. Should I go to hourly until I figure it out? How do any of you do it? To assist in responding, I only bid on small to medium sized trees and haul the trimmings to the local dump. My quoted price includes time from stop to completing the unload. Help please!