I estimate what it will cost. How many hours, dumping fee(s), and equipment used, then I give a lump sum estimate. This way, if I sit down for a few, or take a break, I don't have to worry about the customers being concerned about what they're paying "by the hour". I can take whatever time necessary and do it right, and STILL make a bundle.
Thank you, Dad - for always being the dad that you were. You truly are my hero. You always were.