What are the biggest complications with BBL surgery? How to avoid them?

I am going with a double certified regular board and plastic surgery board surgeon. He doesn't have a lot of complaints but I have been reading horror stories. I probably shouldn't have but I can't help it. I want to be prepared. A girl died on the 16th khimom and I am SCARED. I already paid but I am almost willing to lose the money, instead of losing my life or being botched. I want to know what are all the things that can go wrong and what steps can I do to prevent them. Thank you.