2nd, the coax wired has to be "copper" center conductor and not copper clad, mucst be a specific beldon number or it is a "fail" on the install. Which means? Yes, a lot of rerunning of coax. And WildBlue QC people are like 75% on all work performed.
There's a lot more to it than these things but that's a start. As for the install price for a technician? That will of course vary depending on where in the "food chain" (sotospeak) you are IE: Dealer, wholesaler, or a sub-contractor to one of those.
The $150.00 is a close "fullfillment work" install price. But the company should let the installer get a piece of the "extras work" in order to keep them happy! I am personally dancing around the price inssue just because I will be placing an add soon for "Certified Technicians" with their own Badge & Number but do not have my pricing outlined quite yet.
Hope some of this helped!
