How to achieve a very voluminous hourglass shape bbl?

If you are in good health with a BMI close to 30, you appear to be a good candidate for liposuction and a BBL.  Fat can be taken from many different areas of the body including abdomen, sides, bra rolls, thighs, arms, underarms, flanks, lower back, upper back. You have to consider not only which areas will have perhaps the best fat, but also you have to consider which donor sites will have the fewest problems afterward with the liposuction.  In general, the abdomen and thighs are preferred, but, if those sites are not available, other areas can be used.  Creative liposuction with fat transfer to the hips can make hips appear lifted, and rounder.  If the waist was smaller at one time, the waist can likely be reduced to those same measurements or smaller provided the muscular and fascial integrity has remained the same.  Follow your plastic surgeon's postoperative protocols to achieve the best results.
Six months later you could have a TT to address both the loose skin and the lax abdominal wall as to give a nice, flat youthful contour to the abdomen.  The TT also creates a more youthful belly button.

Thank you for your question.Based on your photos, I would recommend a tummy tuck with liposuction to the trunk and thighs. The fat from the liposuction can then be used for the BBL. You have to be realistic in your goals as well, not everyone can achieve an hourglass figure. Surgery can get you closer to it, but some bodies just are framed that way.

Thanks for the question. 
In this regard, I recommend you a Tummy Tuck to get a flat abdomen and waist and back Liposculpture, getting better curves especially in the waist, improving your body contour.
Finally, I suggested take the fat we get and transfer to the buttocks and hips, to mold them and get better volume, contour and butt projection, is that we know as "Brazilian Butt Lift" (BBL).
Kind regards,Dr. Emmanuel Mallol Cotes.-