Kiku san> Looking for a cheap short term stay in Gold Coast might be a pretty tough thing to do. I have a few friends there so let me know if you need any help. I can always ask them, they are friendly Aussies and Shiba san knows them quite well too. Good luck.
I think $200 a week is really more than enough for a bedroom. I just thought it might be little bit difficult to find somewhere for that particular one week in March. In any ways, make sure to let me know if nothing comes up, I can always give it a try. Cheers.