I found Banff was relatively cheap, except for the restaurants. The hostel (Hosteling International) is the best one I've been in and it cost something like $30/night. The tri-area lift tickets include the shuttlebus from Banff to the resorts and back.
You'll be pretty much the only carver there, surrounded by freeriders and Soft-Booted Park Monkeys. But the facilities in the hostel are great. It's about a 15-minute from the downtown core, which is really small. But the resto food is top-notch. The Silver Dragon resto is as good as the best Chinese food you'll ever eat in Montreal.
You'll need to purchase a service to take you from the airport to Banff. It cost me $95.
In total, I spent $1015, not including airfare, for the 8-day trip. I only bought supper in a resto. All other meals I made myself at the hostel, including lunch.
'later...