Another fun fact, I got my trainees in first two drafts by random chance. They had random starting skills and allstar potential. Always bought cheapest L3 trainers for 1k bid. If you're active enough, you can find them at 7k-8k starting salary.
I pumped up my main trainee to 119 skills, a bit less then 30k salary. My other trainee is at 115 currently, will go to 119 too. My third trainee was MVP pot, came with the original team, not as efficient as the main two guys but still at 115 skills, with reasonable salary.