Hi Deltaheater and thanks for your reply, I am not a native English speaker so maybe I have not used the proper words. I just wanted to say that their potential total loss, supposing they will have a theorical 100% occupation rate at $ 3500/night, would rose various millions. It's like the UA Danish first class mistake fare, supposing a various millions loss if they would have a 100% occupation on all flight booked at a mistake fare.
You stated that the expenses for Hilton would be around $ 35,000 and I agree with your calculation, I just tried to calculate the potential income loss which is another (difficult) and abstract calculation. Suppose 2000 rooms averaging $400/night makes a loss in incomes of $ 800,000 which is not financially irrelevant.
In any case I hope they will consider your point of view and will honour the deal, considering also the positive image they wil receive for their newly renovated hotel.