If you would rather not go through the trouble of making the dough, but still want that home made taste and appearance, check with your local pizza shops or Italian specialty grocers. They will often sell their raw dough in bags really cheap. I used to buy bags of fresh dough for only 99 cents each. Then, all you need to do is stretch the dough out onto greased baking sheets, lightly brush the tops with oil and cover loosely with plastic wrap, then let them rest in a reasonably warm spot so they can rise one more time before baking them.
Speaking of which, do you have enough pizza pans, baking sheets to make all the pizzas? If not, you'll either need to pick some up in advance or borrow some from friends. You may even want to plan out how many you are going to be baking at once, and when they will all be coming out of the oven.
For the toppings, I would definitely make sure you have at least one plain and one other vegetarian option, some white pizzas and some red pizzas with traditional toppings, then perhaps plan on one or two unconventional pizzas for something unique. Just as an example, I would do something like:
- Four Cheese Pizza
- Cheese Pizza With Red & Green Roasted Bell Peppers
- Pepperoni Pizza
- Sausage & Mushroom Pizza
- White Pizza With Hot Banana Peppers & Black Olives
- Spinach & Tomato White Pizza
- Some unconventional pizza of choice, maybe something like Taco sauce, chorizo, cheddar & monterey jack and jalepenos? Or a Philly Cheese Steak (or Chicken) pizza with sauteed onions and peppers, and provolone cheese?