Yeah, I can't see any value in ski lessons in Texas. Even lessons on Mt. Aggie, which is probably the best experience you could have in Texas were basically worthless.
The very few times I remember ever seeing someone at Oshmans or Sun & Ski on that revolving carpet simulator, it looked like the dumbest thing ever. Pretty sure that Sun & Ski has taken them out of their stores as they reached the same conclusion.
Why does he need to know how to ski before the trip? There's no shame in ski lessons. Everyone goes skiing for the first time. I was forced into lessons on my first trip 20+ years ago, blew them off after lunch and ended up wrecking my knee and almost killing myself.