I think you're being very optimistic. Even if you start with 15 18 year-olds and assuming they can get 48 mins every week I would be surprised if they sold for 1 million after 2 seasons of team training. And they would only be bought as backups. Only newbies would splash cash on this kind of players, because the most productive years of training would've already been wasted. And training should be really slow. That 7'0 center would take half the season to pop in passing :P