@flugenblar yeah as long as your browser doesn't bug you every time about the self signed, its not an issue for sure.. Your still encrypting your traffic..
Its only a few seconds to setup, and once you setup a browser to trust you can issue signed certs for all your different things that might want to use a cert. switches, printers, your nas gui, my unifi controller software.. etc. etc.
Use to be better when the browsers also didn't complain about lifetime of cert, use to issue them for 10 years and never had to think about it again etc.. But now I think like 398 days is longest you can issue one for before browsers bitch at you about it.