I fired up #Snikket on a $5/mo VPS and I'm impressed. It's really fast, E2EE, and easy on resources. It and Docker are using a little less than 500MB combined.
If anyone has advice on hardening the install, I'd love to hear it. I don't know what the specific risks are, but there are a lot of ports open for the various services. Basic VPS stuff is done, e.g., SSH keys, no root login, no passwords, etc. No other services on that server, only Snikket.