The tailnet domain doesn’t really matter that much if you have your own. I just use tailscale IP for everything that’s not in adgaurs with a host name already

Tailscale is amazing. When i first started self hosting i tried a bunch of things to avoid a companies solution but tailscale just works perfectly and form what they say in interviews they dont intend to change the free tiers. Its also open source and there’s headscale so eventually you could not rely on the company at all.