I had a hiatal hernia repaired at the same time I was sleeved on 12/10. Total actual time in the OR was one hour. Surgery time varies from one person to the other. I would go under anesthesia once not twice if I could avoid it. Good luck to you.
That's my biggest concern. I don't react well to anesthesia so I would prefer going under once. I asked my Dr if he would do them at the same time and he advised he likes to do them separate which I found odd.