I didn't have any easy solution and this looks promising, congrats!
A few dealbreaker things I can share:
- she has lots of albums already on gphoto. She'd need to easily import them.
- she makes heavy use of the map and text blocks you can add in gphoto albums, which makes each album a kind of travel diary. I don't get the sense these are supported in your product yet, these would be required for her.
- she doesn't have a ton of videos but sometimes she does have a few.
- I'd have some concerns about the longevity of your product - if she invests time into it she wants to be able to look back at the albums in 10-20 years time. Having a convenient way to export the albums would be reassuring to me.
- I think she has a few 1000s photos in those albums, so your highest tier would be too low for her, if there was a way to buy storage that might suit her usage better (though she has a hobbyist budget).
It might be technically difficult and you rejected that path already, but I'm thinking an ideal way for her would be to keep editing her albums in gphotos and sync them to your site, which would take care of the longevity concerns and allow her to keep using the interface she knows (if you linked directly to the pics/vids on google server that would eliminate the cost of storing pictures for you, but I assume that's impossible or prohibited by google's tos).
Anyway, just sharing my use case in case that's useful but congrats on launching and on the good looking product!