You have an 18 year old and 19 year old that I would advice you to train. I would buy 2-3 new players to add to that. You can find much better player than you got in your current squad for pretty little money. I bought all but one of my trainees for less than $10000 two seasons ago and considered how difficult it been for me to sell rather decent drafts I think that you can easily spend less than $50000 in total for 3 players with not too bad potential as well.