What Are the Best Backup Options for SharePoint Sites in the Cloud?

I'm currently helping out a friend who runs a small business with 5 people, and they need reliable backup options for their SharePoint sites. They're using Veeam Community Edition to store backups on a small PC, but they're looking to ditch the server and opt for a cloud solution instead. They are already using Wasabi for storage, but they want to find something more cost-effective and manageable. The focus is solely on backing up their SharePoint site, not OneDrive or Teams. I wonder if a small Synology NAS would work with Wasabi for cloud storage, but I'm unsure about that. Are there any affordable cloud backup solutions out there, especially considering that options priced per user may not be suitable due to their needs? Also, since I'm in South Africa, I'm concerned about pricing that might be reasonable for other countries but not for us here. Any suggestions would be greatly appreciated!