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I'm sorry if this is not the right place but I have a pre-sales question.
In our company we have a server with ESXI 6.5 (free) and several VM's. Each VM has a extra virtual harddrive from 1 datastore.

VM1 Nethserver 50gb + 4TB data
VM2 Nethserver 50gb + 1TB data
VM3 Nethserver 50gb + 500GB data

I would prefer to have 2 complete backups.
1) Local network on a synology NAS
2) Somewhere in cloud (we have some CentOS 7 VPS's)

What is the best way of achieving this? And also, I do not read a lot about recovering. How to recover if something goes wrong? Or worst case if our server would be stolen?

I hope someone can give me some advice.