Although every person heals differently and recovery can vary, as a generalization, I would suggest about 3 weeks before returning to a server's job after a tummy tuck and breast surgery. Your abdominal muscles will be somewhat sore when bending or lifting, and you will need to be careful about not stretching your arms up too high or straining your chest muscles too soon. Often patients will return to light duty for a short time before increasing to regular duty with heavier lifting. Good luck.
Web reference: http://www.pbplasticsurgery.com