I have a place we could do it... and would be willing to contribute. How much does it cost to run for ~3 days with the appropriate amount of casters?
well lets say u cast meteor swarm 2 times per minute, it makes 3000 cast for 24 hours. 4 reagents, lets say 4gp per, 16gp in total. 16x3000= 48k reg money for 1 caster for 24 hours. 4 casters it should be 200k ish max. for 3 days it will cost around 500-600k. the hard part could be finding that much regs i guess.
You'll burn about 8-10k casts per day with 3 casters, for optimum results. If you need any input on security or operations, just let me know. A large keep is the most ideal home for such an occasion, although I suppose a fortress might work better if you set it up right.
I don't think I'd have a problem setting up logistics/security. I'd probably just use an empty tower.
We can run it in my keep if you want. It's nearly setup already and folks are pretty familiar with it anyway.
I'll let you be a caster and you can purp them all down in the end. The keep is setup, just waiting on the reagents.