How do you keep the fees low? I tried it and it was quite expensive on fees
Discussion
There is no fees other than mining fees. Wasabi only works with free coordinators.
Ok, then I had higher mining fees as expected when I tested it.
I don't know when you tested it or with what coordinator or if the coordinator charged you a coordination fee at the time (now paid coordinators are not allowed anymore) so, I cannot explain why you paid what you paid.
However, as I said, currently there is no coordination fee, only mining fee and it is right now 5sats/vb what is a reasonable rate. Here you can see a very recent coinjoin and its mining fee rate: https://mempool.space/es/tx/ec86a5f5d9cb9bb9fa8290ed0ed0af3a8cb7a6b3b76504dd09bbb6ebccb5b024?mode=details
I got the coordinator here from a nostr list. I don't know much about it, I just tried it once.