I imagine the profit point is well below 3000, but I can't imagine it was anywhere close to 400 though. I really don't think this will be successful. But I also think they made a huge mistake starting it in their slow season. If they wanted to do this they should have either started it during Spring Break, Memorial weekend, or Summer. Starting it on a slow day in a slow season was silly and a bad business decision.
The interesting point made by Jim Hill is that Disney have conditioned people to plan their vacations so far in advance that when something like this arises with only 3 weeks notice, people don't have the flexibility to make it work.