Havetoachieve

Hi guys, I'm going to Northwestern this fall. I have already contacted the college regarding the same and they have clearly stated to me that no teaching/research assistant-ships will be provided to Masters student and the tuition fee has to paid in full which is approximately $68000 and living which will come out to $80000. This is too steep for me. I would like to know about external grants/scholarships that are being provided. Also is there any way I can reduce this financial burden other work only on-campus jobs and an internship during summer break.Is it possible to to avail grants from private college like Northwestern ?