if u can't take that chanllenge, just simply forget it.
i went to the states without any assistantship, and have to work night shift as lab assitant to live (only 400/mo). life is hard some time, but it depends on how u think about it.
唉, 本来想转学去美国. 但是一看学费! 为什么留学生的待遇那么苦啊!!