Practically speaking, I would talk to the school(s) to find out what is specifically required for each program that you would need to complete to finish each of the degrees, as well as to add the education onto the accounting BA. It will also give you an indication for financial considerations. These are pieces that might help you with your decision.

HOWEVER, passion goes a long way and should not be discounted. If you know you want to go into teaching and will not be pursuing accounting, you do have baseline certification (AA) for it already to fall back on. I would consider changing to what I really wanted to be doing.