Reading through the vSphere Replication documentation, it seems to suggest that I'd need an entire second datacenter, complete with SAN, ESXi Hosts and a vCenter Server.
We simply aren't a large enough company to warrant the expense of this solution (+with the Essentials Plus licence we are limited to 3 Hosts, all of which are in use at the primary site), surely there is a way of backing up the virtual machines safely each night to a remote off-site NAS?
We aren't looking to be able to run the virtual machines from the off-site location, just use it to hold a backup no older than 24 hours or so.