Thank you for the reply. In my case, I am using the Flint 2 in an office setup. For redundancy/contingency, I will just keep another Flint 2 on standby - configured.
Thank you for mentioning SoftEther VPN. It's my first time hearing about it. I will see if I can integrate it on my VPN server.
In the residential VPN servers, the only challenge I think I will face is the bandwidth. But let's see what the real bandwidth requirement is before I get there.
Thank you once again.