Try vrbo for housing. You should be able to find a small place in east or west vail for cheaper, 99-150. I would come in feb, seems to be the best quality snow. Most snow is in march but it is more dense. 3 days of riding should be fine for you. If I'm in town and you can keep up, I'll be happy to show you around. If it's a pow day I probably won't wait. If it's a groomer day, I would wait. Lol, just being honest.
The vail online price is as cheap as they get.