Oh no, the microbiology guy I’m talking about is beyond full time with his farm. He’s there 7 days a week when he’s not traveling to shows.
And that’s just taking care of the fish and growing them out, not breeding them. He imports from Japanese breeders.
As for breeding new babies and selling them, it’s certainly possible but there probably isn’t a ton of profit in it. Any time I’ve thought about it I’ve thought two things: I don’t want to deal with rando customers and I don’t want to turn my happy peaceful hobby into a job.