Portability is the key for me, because I tend to switch things around a lot. Containers generally isolate the persistent data from the runtime really well.

Docker is not the only, or even the best way IMO to run containers. If I was providing services for customers, I would definetly build most container images daily in some automated way. Well, I do it already for quite a few.

The mess is only a mess if you don’t really understand what you’re doing, same goes for traditional services.

Most likely, a Hetzner storage box is going to be so slow you will regret it. I would just bite the bullet and upgrade the storage on Contabo.

Storage in the cloud is expensive, there’s just no way around it.

There was a good blog post about the real cost of storage, but I can’t find it now.

The gist was that to store 1TB of data somewhat reliably, you probably need at least:

• mirrored main storage 2TB
• frequent/local backup space, also at least mirrored disks 2TB + more if using a versioned backup system
• remote / cold storage backup space about the same as the frequent backups

Which amounts to something like 6TB of disk for 1TB of actual data. In real life you’d probably use some other level of RAID, at least for larger amounts so it’s perhaps not as harsh, and compression can reduce the required backup space too.

I have around 130G of data in Nextcloud, and the off-site borg repo for it is about 180G. Then there’s local backups on a mirrored HDD, with the ZFS snapshots that are not yet pruned that’s maybe 200G of raw disk space. So 130G becomes 510G in my setup.

Wireguard runs over UDP, the port is undistinguishable from closed ports for most common port scanning bots. Changing the port will obfuscate the traffic a bit. Even if someone manages to guess the port, they’ll still need to use the right key, otherwise the response is like from a wrong port - no response. Your ISP can still see that it’s Wireguard traffic if they happen to be looking, but can’t decipher the contents.

I would drop containers from the equation and just run Wireguard on the host. When issues arise, you’ll have a hard time identifying the problem when container networking is in the mix.