@BartV Hey, yes. It was long: I had 5 sources, 24K photos, and archive up to 1900. All albums were merged, all files renamed+metadatas (with exiftool). Then I made a home server Debian + Nextcloud (docker) with the Nextcloud app "Memories". My phone and the one of my wife received an external SD card, and I sync now the 24K photos on all devices (our computers, phones).
I lost a lot of time because of bugs (eg. Trying Ubuntu serv + Nextcloud Snap), or testing galleries without exif date support.