Check out the Radios classified section. Its like a craigslist specific to the JH Valley!
Also if you want to live somewhere cheaper, check out Victor and Driggs Idaho, its over the Teton Pass, so expect a 40+ minute commute each way. More, much more sometimes when the weather is bad or the pass is closed b/c an accident or avy. You also have Alpine, WY which is about 45 mins south of Jackson, the drive through the canyon isnt as treacherous as the pass, but it is a longer drive.
Housing right now is hard to come by. Best best is to set up a monthly stay at a local hotel until you meet people looking for rommies at work.
What does the mountain have you slaving away doing this season?