Set up a wireguard between them, as per your own blog :-)
Netflix detects that I think
Not if you use your home ip address, only if you use the well known vpn providers I've successfully used LNVPN several times when travelling https://lnvpn.net/ Highly recommended!
Theoretically possible though I can only imagine what a pain it would be to fix if something goes wrong on the other end of the tunnel...