Are you absolutely certain that you can't get to your target voice without surgery? I've heard some of the results, and to be perfectly honest, they don't sound good. Most of the women I've heard sound like cartoon characters. As a singer and impressionist, I cannot in good conscience recommend vocal surgery. Training your voice is difficult, especially if you have never exercised it before, but it is rarely impossible.
Sorry to jack your thread like this, but the thought of someone taking a scalpel to vocal cords seriously freaks me out.