I have a 4K 120Hz TV that I have blocked from internet access on my router (because it is spyware with no way to turn off the built in microphone) and I have a desktop that supports 4K but I don’t want to run my desktop into the ground streaming on it all the time.
I’d like one that isn’t American I guess if that really matters (seems like it kind of does) but I noticed options are limited unless you want to spend $600 on a mini PC which I don’t.
I’d like to spend like $200 max if possible for this if possible.
Keep your tv disconnected from the internet completely like you did, and get a dedicated android box like the nvidia sheild for example. You can pick these up second hand for cheap.
Then uninstall any apps you do not require from the Sheild and you should be okay.
Now if you hold your own 4K media collection on a NAS you can install something like Plex and/or Jellyfin and keep your Nvidia Sheild completely offline only to access your local content. Though this really depends on your desired threat level or privacy level.
I just want to add that keeping the Nvidia Shield in a guest WiFi, in your home router, can strength even further your privacy.