when the wife and I had our second child 22 yrs ago, our sex life went on hold for about 5-6 months. i started to do some PE, some jelqing and then clamping, and of course I was jacking. I measured my length at the start 6.5" and at the end 7". I never did check my girth, but I was always pretty thick. when we resumed sexual relations my wife demanded to know who or what I had been doing because my cock was way thicker than it was. not that it was a bad thing, she certainly enjoyed that "stuffed" feeling. I did admit to her of doing some PE, and she thought it was nice that I was concerned about her satisfaction after the baby. so I think your goal is possible, I don't remember my routine. many times I would jelq and jack, wait a couple hours and jelq again and jack. I always took the next day off.