I have setup a syncthing to dump data from my devices onto a staging server which nightly backups everything onto Wasabi using encrypted target with an rclone though any targets that rclone supports would work.
The only thing that I have not figured out how to backup is photos from wife's iphone. I guess I'm going to bite the bullet, buy a mac and do her phone to her icloud, from her icloud to a mac and from that mac to synthing to the staging server.
I have also brought up an edge server that acts as an on the fly decryption proxy to a different Wasabi bucket where I drop files I want to share.
There are third party commercial apps for importing data from/to iPhone for Windows and Mac (iMazing is one of those). If you don’t prefer that, you can also avoid iCloud storage as a go between by getting photos directly from the iPhone to the Mac by using a cable to connect them and importing photos using Image Capture or Photos.
The only thing that I have not figured out how to backup is photos from wife's iphone. I guess I'm going to bite the bullet, buy a mac and do her phone to her icloud, from her icloud to a mac and from that mac to synthing to the staging server.
I have also brought up an edge server that acts as an on the fly decryption proxy to a different Wasabi bucket where I drop files I want to share.