I would guess that the complexity of this class is more or less equal to the trips / projects GB and MA are already offering. Liability, depending on the place the class happens, will surely be different.I highly doubt instructors are making big bucks from an incredibly complex course that so few people are qualified to take...
Qualification: what it is needed? Based on the InDepth article it is CCR2, 50 Tech 2 dives, 25 of them exceeding 75m and a DPV cert. Nothing special.
A driving factor for this class might be, that at the moment it is the only way to get a cert from GUE exceeding 100m ;-)
And for some Hunter-gatherer to complete the cert collection