Lodging is going to be at high season rates and booked. So if you want a place better start looking now and book it. Lift tickets are expensive, so if you are planning on riding try to get a package deal. A day pass is right at $100 a day in Aspen.
As far as lodging goes, if you can't find anything in Aspen, you can look at Snowmass all the way to Glenwood Springs. Glenwood would put you about a half hour from the resorts. I believe the bus system runs all the way from there. You'd be better off if you could find a place further up the valley though. Like Carbondale or Basalt.
The events themselves are free to attend.