ok dont fret about your 'lost ur mind' purchase. Its not that bad.
But lets assume that you arent actually training him or planning on training him. Stick him on the transfer market now! now now now! Someone will buy him and there is chance you may get your money back, or at least a large portion of it.
Players with hall of famer potential go for lots of money, so yer. sell him right now. The money you recoup will allow you to spend on another player, potentially another trainee. Maybe wait to see what you pick up in this years draft?
PS: says in ur transfers page that you only paid $600k for Dure? so maybe not as bad as what ur thinking?
Pumpfrey is also hall of famer potential, but he is getting old. I would also recommend selling him, someone will buy him. same with casstles, get rid of him as a trainee, too old.
Really, a 21 year old trainnee, should have a salary of AT LEAST $15k ... at least. Other people on here may say higher! Otherwise its just seriously not worth it. Training slows down dramitcally after a player turns 20/21, and if you havent put in the hard yards in his early years, then forget them as a trainee.
When i was in my 4th season, i still didnt really understand how training worked either, but i was getting there. . I understand it heaps better now. The good thing about training is that you can always go and BUY a new trainee. (ie: you dont have to draft them)...
Unless you fully understand how training works and are willing to sacrifice other players development and your team success, then dont bother with a super-high potential player and trying to get him into the national/u21 team, its so hard and competitive and really, one or two weeks of fluffed training over a 3 season period stuffs it. ... so go get a lower potential trainee so that you can 'practice' training him. ..Star, or all-star potential (and only max age 19... but buy after post-season processing, see what u get in the draft, maybe u wont have to buy one)... cause they will not cost much but should be ok..... . if you train them for one or two seasons, you can then sell them if you want and then buy a higher potential trainee once you know the ropes a bit more.
ask for help as well!