Long time lurker here. As a fellow intl applicant, I say don't take out loans at all unless you have to. You'll be on F1/J1 visa with work restrictions & a work permit (H1B/ OPT) if you choose to work in the US post-grad. The job market is straight up unkind to immigrants now thanks to politics, and adding private loans to this burden does not help. Of course, if you're determined and confident in these respects, go ahead. Otherwise, maybe it's a good idea to negotiate with the program or apply for Fulbright/ whatever grant you might qualify for. Your embassy might be a good place to call. Good luck!