SeriousBug

I can vouch for the node 804, although I haven’t used the others so I can’t say which is the best.

No.

I’ve been using Kopia for all my backups for a couple years, both backing up my desktop and containers. It’s been very reliable, and it has nice features like being able to mount a backup.

One advice I haven’t seen mentioned: there are tool libraries in many cities where home owners can borrow tools for a low membership cost. This can save you from spending a lot on tools, especially for ones you won’t need often.