Restoring multiple clients at a time

Hello,

I'm working on a DR project where I need the ability to restore lots of VMs (like a 1000) during a failover event.  How can automate/streamline my restore process?  I don't want to go in and manually kick off a restore for each client.  They're all image level and would all be restored from the replica to the same VCenter, so "destination" wise they're the same. 

We can backup at the group level, but how do I restore at the group level so RPO/RTO can be met?  Thanks for your feedback and thoughts!