Your day-to-day expenses in the US (housing, food, transportation, etc.) must be completely covered by your salary/stipend and/or your own personal funds.
The American authorities require that you dispose of a minimum of 1000 U.S. dollars per month.
If your internship is unpaid or paid less than 1000 dollars a month, you must vouch for your personal financial resources at the time of your application.
We recommend that you pay careful attention to the way you will finance your stay keeping in mind that any other job aside from your internship is prohibited and that, in some cases, you will receive your first wages only at the end of the first two weeks of your internship.