Is 300 ml for a BBL even worth it? 5'7, 165 lbs, female?

I am 5'7, 165 lbs, female and I'm going to be getting a Brazilian butt lift and breast augmentation on April 6. I am 30 lbs over my ideal weight so I want them to take 5 ml of fat out of me and inject at least 800 - 1000 cc into my butt. But they're saying they will only take 300 ml out. Will I even see noticeable results with 300 mls taken out? I want my stomach and back fat to be completely gone. Am I expecting unrealistic results? It's so expensive. I don't want to waste my money or time.