Unless I am reading it wrong, you buy the lights and equipment as well. So included in that price I am assuming?
If so, that changes things drastically. C9 lights run about a dollar per foot itself. Not to mention extension cords, three ways, etc.
Plus you have insured workers. Anything involving roofs is gonna be pricey. It is what it is.
Did my uncles house last year. Lights and equipment cost us about $400 and took myself and a cousin about 10 hours. It sucks. I think this year they are going professional. Thank god.
I may not pay for it myself, but believe me there is a market for this kind of service.