So I have a NUC with Proxmox as the primary OS and OPNsense in a VM for my home network. I've been trying to move away from Google services but would still like to use them as a back up solution. Would it make sense to use Nextcloud in a VM as a replacement and use Rclone to encrypt and backup my files to Google Drive? Or should I use a NAS OS like Open Media Vault instead?
I'll also mention that I have an empty SSD that I can passthrough and that my primary draw to Nextcloud is that they have a Windows desktop syncing app like Google Drive does which makes things familiar and convenient. I don't plan on having my Nextcloud instance exposed to the web but might setup a Wireguard tunnel into the local network in the future.
You could also consider a lesser known product, Duplicati. It creates encrypted 50MB chunks of data and maintains a database of what's in it. Have those chunks in Google Drive, and you have your encrypted backups in the cloud.
Duplicati looks very promising, but from a cursory glance it's more for backups? Since the files are split into chunks, I would still need to use a NAS or local cloud storage and have Duplicati do the final upload to GDrive.