I’ve been hosting Emby forever (and the requisite software to acquire content 😉).
Recently I added Nextcloud to facilitate cutting several Google products out of my life. Combined with a few FOSS apps, it’s currently doing the job of Drive (storage) and Keep (notes), and I’m planning to move my contacts and calendar this week.
They are independent, but if it was originally carrier unlocked, you’re definitely okay. The way I understand it, Swappa at least, only allows OEM unlocked phones to be sold as unlocked.
Hopefully someone will correct me if I’m wrong, but if I understand correctly, any Pixel that is carrier unlocked can have its bootloader unlocked via the “developer options” menu. I’ve bought two used “unlocked” Pixels on Swappa and had no trouble unlocking the bootloader on either.
There are a lot of ways to go. My own isn’t particularly efficient, but it’s an old rack mount server. Everything is built like a tank. It’s robust as hell, and yet everything was well used and cheap. Probably not a good solution if you live somewhere with expensive power, but I don’t.