Stacey,
You should pay an experienced and competent board certified plastic surgeon whatever you feel that service is worth. Prices do vary quite a bit -- kinda like cars (think Honda vs Lexus) -- so go with whatever you decide is best for you.
Regarding the combination of a tummy tuck and butt lift. If you are referring to the excisional butt lift, and not a Brazilian lift, then this combination is a frequent one. Usually we call this a lower body lift.
No undue risks or compromise in your results should occur if these are combined and the procedure is performed by a plastic surgeon experienced with these techniques.





