Should I loose or maintain my weight until I can move forward with a breast augmentation?

I have an hourglass body figure, but would like more body weight in my breasts; they’ve always been smaller and it would even out my frame / build. However, I don’t have money for this kind of procedure. Should I go ahead and lose the weight (10-12 pounds) or should I maintain the weight until I am able to do the procedure? My main concern is that if I lose the weight and regain it in a few years, it might re-distribute to areas that I would not perfer. I’m 5’ 7’’ and 130 pounds.