My suggestions:
30 feet tube to lengthen machine drain lines. Makes it easier, less worry about water getting onto floor.
Small space heater
2x 6 foot electrical outlets, the existing ones are getting rusty and generally look unsafe.
Book/reading stands to make it easy for the studens to look at a design:
http://tinyurl.com/373js49v
Maybe a UV flashlight + batteries. I dropped off some UV epoxy, reports are the epoxy dries really hard. Need to experiment with corn starch.