I'll face myself...
That's a great idea!
What I can suggest is for vegetables get canned stuff all you really need to do is warm them up. Heck even cranberry sauce comes in cans. In some places you can even get pre-stuffed turkeys that you pretty much just shove in the oven and let cook with maybe doing one or two things to it. I believe you can also even get packages of mashed potatoes where you add water and cook it.
About the space, maybe you could talk to people stationed around you maybe some of them could do the same thing you want to do then you wont have to feed all of them. You can also make it more casual so people just have plates on their lap and eat that way instead of all sitting at a table.
...to cross out what I've become