The income requirement is more like $1250 and INS is not flexible. The way around that is to have 2 bank accounts (in the US) that you can access via the Internet. Just transfer $400+/- every month from one to the other and back again. PayPal is another option for transfering money and they do have a Debit card you can use in ATM's - they also pay 5%+ interest

I would forget the Mexican bank until sometime in the future. Just use ATM's from US banks. Try to find banks (or Credit Union) that charge little or nothing for international withdrawals