Realistic post-op measurements and pre-op weight for BBL? (Photo)

I'm interested in the BBL (lipo of the arms, flanks, abs, full back) with a primary goal of fuller hip. Im Overweight in terms of BMI, but I'm active &think much of my weight is muscle. A doctor told me I may not have enough fat; another told me I was perfect. I'm 5'4", 174-177 lbs. My measurements: (35F bra) 40.5"-31-40.5 My questions are: 1.What's my max pre-op weight for best result? 2.Are post-op measurements of 38-26-44 realistic? 3.Will I retain a lot of loose skin due to my stretch marks?