Ya. The labour is the issue on this kit as he is going to be building this wire loom by hand and there are a considerable number of wires that will need to be inserted into each end of the harness, plus the switch/remote configuration.
Keep in mind people, this is a kit that would take a tech a couple of hours to install in a shop ($150 labour there) plus at least a couple of hours to assemble by an electronics tech (wire loom, connectors, config $150) plus parts ($50-$75)
Brian needs a reason to do this other than the goodness of his heart....