Academies are easily built, yes expensive but that's where you plan finances for including them.
Training should be required it would be unrealistic to have no training for this. Plus what you have suggested wouldn't really work especially for players with large setups. They would most likely be looking to have multiple of each in each station to help with efficiency.
Also if the shift system was to come in everyone would be screwed with your suggestion.
Academies are expensive for players that are relatively new. Also, the cost of adding additional classrooms is almost the same price so it would be expensive or take a long time to do all the extra training that would be required for this.