I went with a friend to Japan 2 yrs ago with enough money for the 2 week train pass, and I planned on $80 per night for some kind of hotel, and $60 per day for lift tickets. I went to a place in Nagano called Happo One (probably about 5 hr train ride from the Narita Airport in Tokyo), and everything was cheaper than we planned on.
Lift tickets were like $40, a hotel with breakfeast and onsen was around $50 per night. We skied deep pow, and toward the end of our trip, we hit the park at one of the smaller resorts and found some urban in the city. The most expensive part was a taxi from the train station to the resort.
"newschoolers die when their motherboards fry" (pterodactyl takes tokyo)