I have a customer who wants me to quote the planting of 20, 8-10 ft. White Pines. He has agreed on the cost of the plant material, but is looking for a labor quote. I typically would do this job by the hour, I guess thats the easiest way of being sure your getting a a fair rate, 2 men $55.00 per hr. However I really need to learn how to estimate this type of work. How do you estimate for the unknowns? Example: The location where these are going is very boney. It may take me 45 mins. a hole or 3 hrs. Any feedback is appreciated. Thanks.