There are probably more then a few people on this board sitting with 50+BTC from the early days who could setup a coordinator
Setting up a coordinator doesn't cost any
BTC, a coordinator just sends messages back and forth to participants.
Once again, if I setup a CoinJoin Coordinator for Wasabi users with a bit of tweaking it's not impossible. Getting people to use it would be the issue. But if I am charging no fees I can see where every TX came from and where they went.
How would you be able to see where every tx came from or where they went?