Tummy tuck and vaginoplasty in the same procedure?

It should be totally safe to undergo these procedures together as long as you are healthy and your board certified plastic surgeon feels it is appropriate.  Those surgeries generally go well together.  I hope this helps.

Hello and thank you for your question. I frequently perform these two surgeries together at the same time. 
Make sure you specifically look at before and after pictures of
real patients who have had this surgery performed by your surgeon and evaluate
their results.  The most important aspect is to find a surgeon you are
comfortable with. I recommend that you seek consultation with a qualified
board-certified plastic surgeon who can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon