Me and a couple friends looked into running a Pixelmon server on several occasions and it's certainly doable, but it wouldn't be cheap. The Pixelmon mod requires a huuuge amount of space on the server just to host a small group of people, let alone a whole forum's worth, so I'm not sure how practical it would be to have one given the month-to-month costs of those kinds of permanent servers. I absolutely love the idea of making one and have suggested it myself several times in the past, but I just don't think the funds are there for it haha. If people were interested in paying towards it then I'd happily run one myself, but unfortunately I think it'll just be much easier to stick to other people's servers for now.