truth is that most immigrant students are NOT allowed to work here, not even part-time, so the hardest part you'd have to prove is that you have tuition and all living (food, rent, transport) expenses covered by scholarship, grant, or your own (or relatives) money to spend. only after you've proven this to your local US visa board will you even be considered for student visa ~ next you'd need a university to accept you. it's not so easy to hop the pond and land here legitimately w/a student visa in hand bro, never mind setting up shop on the sly.......