For a school I recommend a closed box printer with minimal supervision and maintenance needed. For art a great print quality and dual extruder are necessary. Stick with one brand to rapidly get to expert level with the printers.
If you are yet unrestricted to a stock of filament in a certain size, I would go for a 1.75mm system such as the Flashforge printers.
Put in a grand for filament and see if you can make a deal, again sticking to one brand (I recommend colorfabb, EUmakers or Formfutura)

The BCN3D+ is also an interesting printer because it is affordable and direct drive. I am looking for people that have experience with this.