LOL, no, you just gotta remember that on Sundays it can be quiet. I guess the first thing I'd do is go to
www.stampinup.com and check the demo locator. See if you can contact a demo who'd be willing to work with you. Maybe the two of you can come up with a plan. Like, ask everybody to contribute $5 each or something to go in together and get all the supplies.
Your demo can help you create a couple of projects so that you use maybe 2 or 3 different stamp sets in a variety of ways. That would cut down on the need to buy lots of stamp sets, especially if you have some of your own to use as well.
So you'd plan the projects, purchase the supplies, divvy up what should be a minimal cost, and everybody'd be happy. Maybe the demo would be willing to forego her commission (not a lot, it's only 20%) but for a good cause....?
OTHERWISE, see if you can find a local stamp/scrapping store that might let you use their classroom area? Then you and your friends can bring your own stamps, maybe just buying the materials from the store.
That's about the extent of my ideas, sorry! Nice thing you're trying to pull together. I wish you luck!