honestly, this procedure is one step beyond just changing a serpentine belt, which is routine maintenance.
i remember owning cars that you had to have a spare fan belt (or 5) in the back, including some serpentine belt cars, just incase it broke, you could replace it on the side of the road. which i have done on a few occasions as well.
Honestly, the thing i am surprised by in this group is the number of people who attempt the timing belt as their first adventure into mechanics. I understand it from the cost of labor, but the cost of getting it wrong is much higher. But then again, that is why others of us are here, to help people figure it out.