This is what the Player's Guide says about the Training Budget:
"This refers to the value allotted to preventing injuries. Training specifically refers to the preparations made by players and staff to keep the team healthy. While some players will always be more injury-prone than others, spending money on training can significantly limit or minimize player injuries. Training also helps slow down the aging process."
Oddly enough, this is the first time I have looked at this in the Player's Guide.
It reads to me like your Training budget has Zero Effect on player development (outside of making it less likely a player gets injured and loses development time).
Am I misunderstanding this?
Are Coaching, Playing Time, Makeup and Potential the only factors affecting Player development?