What you rather.. for example trainer for GK, trainer for defender etc or just have one trainer do every player on the team?
Worth having trainers each position or just one?
Posted in General
1 for each if you intend to use specialized training, if you intend to just training match, then 1 will be fine, but he'll need to be 20/20/20 or as close as you can 
For me it's best to have:
1 GK
1 DEF
1 MID
1 OFF
1 Team training: Training Match/ Interval/ Team Building
This way you can have most trainings available on a rotation and you'll always have a training group that a player can be assigned to even if he's already had very specialized training or needs some 'fixing' training to compensate for poor training. You can also train your youths in both team with the extra group for team training. I have an additional GK coach but consider letting his contract expire as I haven't used him in a while.
1 GK
1 DEF
1 MID
1 OFF
1 Team training: Training Match/ Interval/ Team Building
This way you can have most trainings available on a rotation and you'll always have a training group that a player can be assigned to even if he's already had very specialized training or needs some 'fixing' training to compensate for poor training. You can also train your youths in both team with the extra group for team training. I have an additional GK coach but consider letting his contract expire as I haven't used him in a while.