But sometimes you can't find veterans that fit your skill needs for a certain salary, so you've gotta train one up to fill that hole.
Basically I view anytime that you're training more than 1 player, it's a rebuild. You can't just give both trainees Cup/Scrimmage minutes for 1 position training. A trainee would have to go 48 in league play. That'll cost the team league wins, and used to cost them ticket revenue. Now ticket revenue won't be hurt as much.
You can buy someone whose already semi-trained and 22-23 years old who can contribute in league play as you round out their build, but those guys will be expensive.