No, it probably won't stay viable for them to use at home. In my experience, many of my students wait at least a couple of weeks before venturing into cheesemaking solo - then they call to ask if the yogurt starter I sent with them will work still.
Also, if they are going to be buying past/homogenized milk, veggie rennet may not work for them, setting them up for failure. I tried vegetable rennet with about 6 different locally available p/h milks and never got it to set up.