Insane maybe but there is no alternative if one wants to uniformly develop 10 sheets at the same time, in daylight. I was very reluctant but decided to bit the bullet and purchase a brand new drum in 2018. I dont have a processor, insted I'm using manual rollers with great satisfaction.
I'd also say that the Expert Drum is probably the most chemistry-efficient daylight tank option that exists for 4x5, especially when you haven't shot enough to completely fill it up. That alone is a huge advantage of the system to me, despite the large up-front cost. It means I'm far less hesitant to immediately process the film from a morning outing.