Using an external ESXi host to backup all the environment

Hi there,

we currently hace at the office 2 ESXi hosts with a SAN using FreeNAS.

We recently got a third ESXi that we want to set up in another physical location outside the office but connected through a VPN network, so we can backup our environment at the office and send it somehow to that new ESXi.

What is the simplest set up you would do in this case? We don't need HA, but somehow send a daily backup of all the VMS and Datastores and somehow manually recover the VMS and data in that third ESXi so we can keep working, even if is not with a great performance. The downtime can be some hours.

Thank you