Please don’t host a router on a Hypervisor VM. That does not benefit security. First of all a router is an integral part of the (home) network, therefore it should not be dependent on anything, like a hypervisor. You want to be able to replace or update your server/ hypervisor independently from each other, for example in 5 hrs your router might be still rocking all data, but you would want to upgrade your home server / hypervisor. Furthermore all those OpenWRT, PFsense, OpenSense kernel/ OS hardening is more effective on the hardware itself, especially all RAM/ Memory based security measures. Also if you truly want to be more secure, you use dedicated hardware for multiple reasons, performance is dedicated to only routing/ firewall processing (no other service/ VM can block or slow down packet processing), reducing the attack surface (less software, less attack surface), easier to update.