I really don't know, but it's got to be quite a bit. Running all of the attractions, keeping the lights on, plumbing for the restrooms/water fountains, A/C, Cast Members to run the place...it all adds up.
I was told by a CM that WoL should be open between Thanksgiving and New Years. Evidently this was in the CM news artical. I'll be there during that time so hopefully i'll get to see it for maybe one last time...
If this is true, and it is open while I'm there the week after Thanksgiving, Disney will be able to cross off one of those million dreams. I'll be like a kid in a candy store, and will most likely wear out my digital and video cameras. Ah, Cranium Command and Making of Me, how I've missed you the last two trips.