My 2 cents. As a dad of a 2020, I would not be interested. Sure I'd love to know what the future holds, but I'll find out eventually. I've invested in a pitching screen, a bucket of balls and a fungo bat. He has his mind set on D1and from what I see, he has a chance at it. I think if he continues to put in the extra time, continues to get bigger and continues to do well at PG tournaments, he'll have a shot. I enjoy all the time we spend together working towards his goal.
This is not to say, your idea won't make money. I've seen parents spend money on lessons with a former MLB player for kids who have very little potential.
I'll continue to read this forum to make sure I'm making the right steps to progress down this path, but I see too much risk and little return with your idea. Good luck.