Here's the deal. Most resorts are not cheap. Even the mom and pop area, Loveland, is going to be over $60 a day. Places like Keystone, Breck, Winterpark, and Copper are pushing $90 a day. Summit County is where most of those (not Winterpark) resorts are near too. You can find some decent lodging deals in Summit and there is decent night life there. More so in Breckenridge. Vail would be another spot with a good night scene, once again the tickets are expensive, so package deals are the way to go.
One thing about Summit county is that if you have a car, it's a short drive to Loveland, and as mentioned it's more affordable. You can also find lift ticket deals at the local grocery stores. Better to buy in Denver if at all possible.