You can install it right on the TV, they have a first party app.
ch8zer
Great! I just tiled a part of my basement (first time doing tiles) because we replace the hot water tank with a tankless.
Since it mounts on the wall I had to remove the old cracked tiles under the tank and put in new ones. It was pretty straightforward but I found wiping the grout to be really messy and not as easy as it seemed in the videos. Using the tile saw as also daunting but I got it done.
You could try something S3 based, and do backups by date?
For example, export a subset of the DB and name it accordingly (ie. 2025-04-to-2025-01.tar).
If you do that there are a lot of pretty cheap S3 providers (like Wasabi).
S3 interfaces nicely with RCLONE so you can move providers etc and pull it really quickly.
As an aside, when I looked into something like this the thing that made me hesitate was the time and cost for retrieval from cold storage (like amazon glacier) outweighed the savings.
Tailscale has an AppleTV app, just download it and add it to your talent.