Plex allows you to add a list of local IPs that can access your server without authentication, just have to be sure to do it while your internet is up or else you won't be able to log in to edit the setting.

Nah, there’s nothing wrong with that. I’m the same type as you and just print until something goes wrong. While I enjoy the journey of 3D printing, what I really love is the results. As long as you get the result there’s no need to tinker unless you just really love that aspect.