tissue expansion

Tissue expansion(to stretch the tissue, due to not having enough extra skin). The docs want to put balloons in my back and lower part of the buttocks to expand over time. It will take apromimately 10 months to grow and it will also require 4 surgeries, as they can only work on 1 side at a time. I am a little unsure about this and am wondering if anyone has other options.
Thank You