I suppose anything is possible. That's why there are such people as loan sharks, after all.
Meanwhile, may I ask what causes you to be in "desperate need" of augmentation surgery? If it is necessary due to medical need, such as reconstructive surgery after a mastectomy, then you should check with your surgeon or health care provider to see whether there are any payment options available to you.
On the other hand, if your "desperate need" is because you aren't satisfied with your A-cups and you badly want cleavage, I think you would be better off spending the money you don't have on a bit of therapy.
In my opinion, in the greater scheme of things, breast size really isn't all that important.
