I just posted this link on another concierge ? post. I bet it would also be very helpful to you!
Concierge Reviews
As to your question about expense--yes, it can be expensive to stay at this level. Sometimes you are able to snag some discounts, but those are usually few and you need to be first in line. I have no idea what the price range might be from least to greatest, probably in the $300-$1,700 per night range. In the value season that could drop to $250 p/night. Don't hold me to the prices--they are merely estimates to give you an idea.
Hope the link helps!