I currently subcontract the installs on my estimates. I design the systems, pull the pipe and disappear until time for electrical hookup, timer, and final adjustment. My subcontractor has to hire his own help is he wants it or he can do it himself. The price he is paid remains the same. I will usually structure some leeway as to how soon the jobs need to be done, based on homeowners needs. The current rate we work off is 20% of the estimate. I provide all the equipment, parts, and overhead and he is given a check for the 20%. He is well satisfied and I seem to be doing o.k. but we never want to give more than we need to. Is this labor % way out of line or in the ballpark.