Hi and thanks for your question. I feel you have realized that with lipo and a BBl alone, you will have hanging skin, sitting or not. You are Avery good candidate for lipo and a BBL. IMHO you could use 1200-1400 CCs . This can only be made possible if the fat donor sites are your abdomen, hips, flanks possible arms and inner thighs. You also need to realize that you will need a tummy tuck to have a flat abdomen. I would caution you against having both procedures done at the same time for fear of affecting fat survival and eventual results. I am not in the camp that advocate doing both (tummy tuck and BBL) at the same time. Think about it, When fat is transferred to the buttocks, the fat cells need all of the oxygen possible in order to survive. Fat transfers (BBL) require a rich oxygen environment in order to attempt the highest rate of survival of the fat cells. Fat is not just transferred to the buttock region. In order to obtain that shapely pear shape behind you must transfer fat to the area of the hip laterally to make for more attractive curves. If you lie on your side it will place undue pressure on the transferred fat cells and perhaps flatten out the area. We recommend that our patients do not place any significant pressure on their butts for 4-6 weeks following the BBL.If you have a Tummy tuck and BBL done at the same time, how are you going to avoid lying on your back, face up when the tummy tuck prevents you from lying face down? I recommend that the BBL be done first to utilize the abdominal fat which would otherwise be discarded with the tummy tuck. After a minimum of three months , the patient is brought back and the TT is performed.In our office we use TouchMD which is a web based program in which patients have the ability to load their picture unto the program. We can accommodate patients from as far away as California. I then evaluate them and can actually draw on the picture to show a potential patient where the incisions would be located and how the procedure is to be realized. It's all done to comply with HIPPA which is the federal law that protects the patient's medical information. Look them up.Give yourself the highest percentage of a sucssesful operation. Good luck, research then research some more, Dr. PG