A shop would charge you a butt ton of money, of course. While it's not a super-difficult job in and of itself, it's considered a major job to do all of it. Just make sure you don't swap uppers from one side to the other. That's been about the only common mistake I've seen when people tear them all the way down.
But that's why they make impact wrenches. For those bolts that don't like coming off.
