I would think the most important is to find out which program can best support your research interest. Which program has the most number of faculty members that are specialized in immigrant literature or related area so that you will get the best knowledge in the field. Also, many graduate programs have graduate assistantships; even if not within your program, you may find graduate assistantships in other departments of offices on campus. Perhaps you want to learn about those opportunities at both school. I would advise against any kind of illegal working because they often don't add anything to your professional experience and can be actually distracting. If you want to stay in this country, you don't want to risk creating any illegal record. If you can find GAs, it would cover some if not all of your tuition and also provide you with a stipend that will definitely help with your financials. One thing you should also know is that it is after all possible to transfer to other schools, better schools once you are here. My friend studied foreign language teaching in New York and he started off at Hunter College of CUNY because he couldn't get into a better program, a year into the program, he was able to transfer to NYU's equivalent program; the transfer process was much easier than the initial application process to NYU.