This is personally how I feel. Money is the most important factor here, do you need the money and is your family situation in need of money? If yes, then I believe that you should take the offer. From my limited experience and from what I hear from friends, foregin banks definately pay better than locals. However, the politics over there is also greater.

If u work in the bank, u should consider enrolling in a local college/Open Uni for some diploma or degree in banking/finance since ur interest is there. However, due to age you MUST be sure this is the path u want. Because after this ur E&E wont be that useful.