[martin_a]

Don't know why the other comment is dead, but Nextcloud/Owncloud might really be a solution to this.

I run a Nextcloud instance and it supplies me with:

  - Calendar through CalDav
  - Photos through automatic uploading from my Smartphone
  - Drive, obviously, through Desktop and mobile client

All of this could be run on a small managed webhosting with Hetzner (for example), their hosting would also provide you with a domain of your choice and mailboxes, so GMail could be done by that, too.

I know that there are extensions/plugins for Nextcloud which provide something like Keep functionality and there's also some plugin to connect to some hosted Office suite stuff, but I didn't look into that, yet.

So: Give Nextcloud a try.

[martin_a]

Let me add: If you find yourself short in storage, you can also mount a Hetzner Storage box (or something like that) as an external storage to your Nextloud. That adds 1 TB of storage for 3,50 €/month or sth. like that.