MBA From Hult Or Murdoch University VS. Boutique Investment Firm Based In Portland, OR

I have applied to over 150 firms in the last 3 months and none of them have gotten back to me with positive responses. I don't know what to do with my life. I majored in Business and minored in Computer Science and Economics from a Top 40 University in the States. I am going to graduate this May with a 3.45 GPA but no job offers. I am an international student so I have 3 months to find a job before I get kicked out of the country. I have an internship offer from a tiny investment company based in Portland, OR but I don't know if I should say yes to this offer as it does not guarantee a full time position. Also, I want to work for a bigger company where everything is more structured and I know how to move up the ladder. I also have the option to continue school and attend either Murdoch for an MBA or Hult University for a dual degree Masters program in Finance and International Business. Please give me advice and tell me what I should do. I really do not want to waste my time and money after I graduate.