I had liposuction on my thighs, buttocks and lower back and a full tummy tuck at the same time.I had the most surgery you could have had done at the same time. I was very happy with the results although the pain was terrible for 10 days after the procedure !! Way worse than natural childbirth!!! Had to wear a compression outfit ,much like a triathlon suit for a week or so.
You can have them simultaneously. The time will depend on you. If you have enough money saved up, then you don't need to wait long to get liposuction.