Just get the oracle free tier. I've read my share of FUD about how bad oracle cloud supposedly is, but went ahead anyway. It's been something like 3 years, no complaints (including ~1.5 years of running their 4-core ARM/24 GiB RAM/200 GB HDD machine). https://www.oracle.com/cloud/free/#always-free I've used many other free tiers over the years (living in a low-income region you pretty much have to), and they make it…
The 10TB of free oracle bandwidth means you can store media-intensive applications on the instance. For data at rest, I simply nfs-mount a 14TB disk I have at home hooked up to a raspberry pi running tailscale. tailscale is the bottleneck here because it pegs the cpus of the rpi and oracle instance, but I still get 250mbps (something about the arm crypto implementation being slow.) There's some rummaging that go will improve the crypto performance so fingers crossed. I think I'm using less than 10 watts with this setup.
For backups I keep it simple and plug in an external drive and run borg every once and a while. It's manual since the backup disk sits offline.