My wife is using Google Photos, and I've been using Photoprism for a few months. I just had a baby, and I access to download the pictures that my wife takes.
I'm not too sure of what I want. I guess I want two separate libraries, but I want to be able to view her pictures easily and add them into my library.
I believe if I spin up a second photoprism instance, I'd have to download her pictures individually and reupload them into my instance.
What do any of you do? Do you even host photo storage for your family?
Tagging onto this: Does anyone know of the easiest way to backfill Immich with photos from Google photos all at once besides manually downloading them from the Photos site?
I used rclone to get all my photos down, then I used Immich’s bulk import API to get everything into Immich just yesterday. I did about 14k photos.
Take note of the limitations of rclone though, it won’t get the original full resolution - https://rclone.org/googlephotos/#limitations you need to use Google Takeout to get full resolution.
To add onto this, has anyone found a good way to combine the metadata back into the photos from Google takeout? I've found two solutions on Google, one was send it off to some company and pay them to do it and the other has me run some pre compiled exe file. 
I'm starting to think I'll just have to live without the metadata or write my own solution.