For fair disclosure, I know just enough about making and heat treating knives to be dangerous. That being said, according to the KH 418’s specs it is not rated for continuous use, which is 3+ hours. So I would assume that means it’s usage would be restricted to 3 hours at a time or less. Likely less, unless you were doing a slower ramp speed to your target temperature (edit: I said “speed” earlier) (<800F / hour) plus an hour at your target temperature.
Reading more this evening, it looks like the LB 18 is the most common sold Evenheat, not the LH 418 like I thought. That does require a 240V setup, however. On the plus side, the width and height are 10" wide x 6.5" high. Versus 6.5" wide (edit: I previously said 10" wide) x 4.25" for the KH 418. It also is not rated for “continuous use” / “3+ hours”.
I’m not sure what the requirements would be for ceramics if that’s an expected use case for the kiln. Would 10" wide x 6.5" high x 18" deep be sufficient?
On teaching: Unfortunately, I wouldn’t be able to do this due to other commitments. Plus, like I said, at this time I only know just enough to be dangerous