When I picked up my second mill in 2006, the dealer had just got in his first Lathe-Mizer. I was there early and the manager was just about to assemble the Lathe-Mizer for a demo later in the day. With time to kill (and a good deal of curiosity) I helped him set it up and try it out. So, a few observations ...
Mounting the logs was slow and tedious. We both figured it would be much faster with a few simple accessories (made of wood). Knowing what we were doing would have helped, too
You have to saw the log down to an octagon shape before you can "turn" it. It's got an indexer that lets you saw squares, hex's, and octagons -- even triangles if you want. The turning motor is 110 Volts so you need to be near a power source.
You'd want to be in production mode to make a go of it. That means several days of doing nothing but turning logs.
You might find a better market for octagonal or hexagonal posts, rather than round ones. Less processing and you'd have something different to offer.