On a scenario like this (dual hub/single dmvpn cloud) can I add another site as a hub? I am trying to avoid loosing all the dmvpn hubs when located at the same site?
In some cases yes. SD-WAN isn't the solution for every WAN connection setup. There are still plenty of customers running DMVPN over Internet and MPLS without issue.
On a scenario like this (dual hub/single dmvpn cloud) can I add another site as a hub? I am trying to avoid loosing all the dmvpn hubs when located at the same site?
Yep, common way is to add site, DC edge for example, add the hub and join it to the rest of the cloud.
Isn't SD-WAN replacing all this?
In some cases yes. SD-WAN isn't the solution for every WAN connection setup. There are still plenty of customers running DMVPN over Internet and MPLS without issue.
Can we get config files?
GGs