Figuring a 3 month season, 4 if we're really lucky, they're probably blowing snow on average 4-5 days a week from late November through February. That shit ain't cheap.
Most of these places also operate 12+ hours per day instead of 7-8 hours per day out West where only a handful of mountains operate after 4pm.
Most of these places are also located a stone's throw from major metropolitan areas. There are 4 ski areas within 30 minutes of my house in fair weather, and there are 1.5 or 2 million people in the same situation. So there's a very captive audience of people who dno't ski maybe 5-7 times per season, but they ahve to price high enough to keep these folks buying day passes instead of season passes, etc.
Good point about the lighting. That's extra costs there.
Wilmot doesn't appear to have lodging to soak up extra cash either.