I am new at irrigation on my own although I was an irrigation tech for a large tree farm and have alot of knowledge on how to put in a system but I don't know how to charge for it. The parts are cheap a 10 ft piece of pvc is 2 bucks but I want to charge 5. Pop ups are 3 I figure Id charge 6 . In fla its sand so and with no sod I can easily trench but I don't know what to charge for labor. Any pointers?