CaliforniaPizzaGuy,
It isn't clear from your description of the oven whether it is a commercial oven or a home oven that is commercial size. I am unaware of a Hotpoint commercial oven, only home ones. If your oven is a home oven, you should be able to bake any type pizza at 500 degrees F. Some home ovens can get to 550 degrees F (on other than the clean cycle), and some ovens can be tweaked to get another 25-30 degrees F out of them, but 500 degrees F should work fine. Even commercial ovens usually aren't used at those temperatures, although they are often rated higher.
Peter