Just wait for a few months for an existing stock of prebuilt PCs to run out, and you’ll see their price jump even higher.

Cheap Chinese Pi knockoffs like OrangePi are also becoming more expensive, it’s because the cost of the components increases. AI companies now buying all RAM and every RAM, even ancient DDR3.

Separate box with Raspberry Pi and Kodi, and don’t connect your TV to WiFi or any other network connection, just an HDMI cable.

Or buy a TV box specifically supported by LineageOS or other opensource Android TV ROM.

In theory you can try to root and replace your TV firmware, that gets messy fast because most of them do not have any custom ROMs.

Smart TV are trash of the trashiest sort. Cheapest components, painfully slow, 4 GB flash stuffed with outdated buggy Android and preinstalled adware, with 200 MB free space for anything usable, zero chance of updates, tons of security holes, and pretty much abandoned by Google.