Yes, doable.
One of the beauties of serving calzones in quantity is they are a fully contained item, as in, no muss or fuss involved in terms of slicing/cutting/serving portions at service time (provided the dough is sealed well to prevent the contents from leaking out)...they're a good "grab and go" item easy to plate up or serve from a buffet.
Also, you can make them and parbake then freeze which will reduce the amount of time needed to finish baking them at service time. Or bake off completely then reheat briefly to serve but my first choice would probably be to go the parbake route.
Another plus, calzones tend to stay hot longer once baked since the hot filling is contained inside the crust so the food won't tend to get cold quickly as can happen easily when serving this size group.
I'd say your challenges will be:
- storing or freezing that quantity
- baking at service time if you need to serve them all at once (how many ovens will you have?)
- keeping them from getting soggy at service time -- once baked you'll want to serve them right away. Don't have a recipe for you but I'd say to choose a sturdy dough recipe.
- consider making more calzones than your guest count if you'll be serving from a buffet OR have a server on the other side of the buffet table serving one calzone per person (limits surprises of running out of food if guests take more than one -- which they sometimes do at buffets). If doing sit-down plated service you have better control.
With 10 helpers the project sounds doable and could be a lot of fun once you get everything set up and ready to assemble. I currently work with several caterers preparing food in large quantities for big groups and would happily volunteer to help if I lived closer. smileys/smile.gif