Transferring from Boston Uni to a more generous school

Yes, I am on a leave of absence, out of the country.
My visa is still valid, tied to BU. Once I get an offer of admission from another college and confirm it, I would have to apply for a new visa.

There’s basically no financial aid for international transfer students.
Your best bet would likely to try and apply to a European university -Trinity Dublin is very good for Humanities for instance.

You will have to prove you are financially viable for your visa, as you have dropped out due to money already, is that really going to be likely? How much was your FA at BU?