Like Clarkie, I'm interested in Marvelous Designer. But last time I looked into their perpetual licence for private users, I had to give it a miss cause I was left with the impression that while I am free to create clothes for my Poser figures and even sell commercial images that made use of the clothing in those images, sadly, I would have been unable to sell any clothing meshes I outputted from the software.

Whether I got that right, I honestly could not say, but that's the impression I was left with. I think probably, at the very most, you might be able to give away a clothing mesh you designed with it, but I feel pretty sure that selling a mesh would not be allowed without the commercial licence. That said, if there is an income limit, maybe it is allowed, but I don't recall reading about the existence of a limit.

Definitely ask them directly, Clarkie, and if you do, maybe post a heads-up in this thread so that others can see what they said. I'm definitely still curious, but not enough at the moment.