Wait and you will get a better result

There are several reasons not to get a tummy tuck at the same time as your C-section:

1. Circulating estrogens will generally result in a less favorable scar
2. You will regain some skin tone and elasticity in the coming months after delivery.  This would give a more accurate and tighter result.
3. You will regain some muscle tone as well.
4. You need to focus on you and your newborn baby.  Not the time to be recovering from a tummy tuck
5. C-section is arguably a less sterile procedure than a tummy tuck
6. I would question the judgment of the PS doing the tummy tuck at the time of a C-section.
7. It may not save you money anyway, particularly if the procedure could be done in an office operating room.