@neil
S3 storage not so much of a nuisance if you run garage.
Create a normal directory on your server, configure garage to use that dir, then create buckets, ACL's, etc pretty much as you would on any S3 storage.
Garage even supports serving up static websites from S3 buckets.
It's a single binary so install is .. simple.
I'm currently using garage on a cluster of 3 nodes for resilient restic backups.

https://garagehq.deuxfleurs.fr

@neil on that note, minio used to be the go to for self hosted S3, but they recently moved to only making binaries/containers available to paying customers, and while the core code is opensource you have to build it all.

Alternatives appear to be a project called garage.

I have a minio install (that I use for playing with more than prod), but looking for alternatives is on my list as I was thinking of using it as a backup target