I wish you well with this experiment. I went down this road years ago and unfortunately it did not work out. I had 3 transplant sessions and the end result was a 1 inch wide hairline that isn't thick enough to look good. I would need at least another 2 sessions and there's no guarantee. Even thin hair piece behind hairline doesn't match up well. It still looks like a wall of hair behind the transplant. It looks terrible. You can still see the front edge of the hairpiece and now I have scars and thin hair in my donor area and I have to shave the stubble at the hairline so I can attach my hairpiece. Not to mention I'm out about 10 grand. This was unfortunately a big waste of time and money I regret to this day.

Bottom line is that hair transplants just can't put hair close enough together to create enough density for a thick enough hairline. If you put them too close follicles get damaged and die.