If you have an MBA, you can also realize that Time is a resource. If you Truly are going to be using your MBA to it's full earning potential, you potentially will be working 80hours a week once you get a job.So if you are on a good track for a high paying job, you can spend Money now (possibly going into some debt) while you are Time Rich, and make it up later, when you are time poor but money rich.
However this is only something you can judge and your own perspective to personal finance. If this bankrupts you and puts you on the street it's not a good decision.
You're already sunk cost into the trip, so you better maximize your time there to have an experience you want to check off.
From a pure valuation standpoint, Vail is NOT worth it, because there's this thing called the Epic Pass, or even the Epic Local or Tahoe Local gives you days at Vail. The day prices are kept artificially high in order to protect the value of the Pass. If you take a survey of skiers skiing at vail, a bulk of people are going to be paying way lower for day's lift ticket.
It's the same as if you walked up to an airline counter at the airport and bought a same day ticket..
At a minimum, if you end up buying a day ticket, be sure to buy a couple days ahead online for the best price.