Tutorial : Multiple VLAN for Windows hosting HA in Virtualbox

After about 4 weeks of running this setup I ran into a critical flaw with Windows that I have since found a solution:

Default gateway and routing.

Problem:
Even if you manually set priority (network connections > [nic ] > IPV4 > advanced > change automatic metric to manual (lower is higher priority )) , Windows will seemingly randomly just choose another NIC. Great!

For me, this resulted in extreme silliness like loss of outgoing WAN access because it was routing through a VLAN that I turned off internet access to. I used to have all the VLANs connected through my router so even my local nas was routing through my router (in retrospect, it was quite the funny joke that further receded my hairline as I saw speeds drop to gigabit when I have 10gbe LAN)

This does not effect home assistant

Solution
The only reliable way to fix this, it seems, is to REMOVE THE GATEWAY from non-preferred VLAN configurations. That means you have to manually set the IP on VLANs that do not need gateway access. For me and probably most people, this means every VLAN other than the default (1) will function as expected if you remove the gateway.