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.
I stayed at The Village in Breck last January. It was $100 per night for a room with 1 King bed or 2 Twins. It was a pretty nice place and the room was plenty big. The Village is right on the mountain.
Or you can go the cheaper route... 1st Inn in Silverthorne was $50 per night in beginning of March for 1 Queen bed.