Buying a Colorado pass may be what you want.... Getting that pass will cover where you've mentioned that you want to go, and you get discounted tickets with that pass for others that are coming with you.
Good luck on cheap lodging.... The only way your going to do that is if you get a place in either Silverthorne, or Eagle. You won't find anything under $140-$150 a night at a resort. Probably closer to $200+ a night for a small place.... I know in Silverthorne you can get rooms during peak season for just over $100, same with Eagle.