If you think so, then just slow the primary trainings down quite a bit. But there still should be some option for single position SF training.
Great idea.SF training and SF representation in the game engine needs some attention, IMHO.
I think the training aspect is challenging to a fault, and the SF GE aspect is a failure in representing the game of basketball.
I've also heard a BB say that it seems unbalanced that the SF position is the only position without a single position training slot available to it.