What are you considering expensive.
About the cheapest you will find a room for is $500 a month so about $2500 for a 5 bed house is going to be pretty good. Obviously you can make it cheaper if you dont mind sharing a room, ie split the cost of 1 room between 2-3 people.
As has been said check out the pique, there should be a few things coming up soon.
Also quite a few jobs offer accommodation so depending where you work that may be an option.