Great idea! Makes me think, it would be interesting to see a political prediction market where the winnings go to your preferred candidate in the race. Not sure about if that would have a positive impact, but would be cool to study.
Edit: Just read your post and see that you discuss this haha
Yeah it definitely takes time to do it right. But even if you personally do not have the time, starting the group first and focusing on finding people who do have the time could accelerate growth.