hey if you want a router these do exactly what you are asking for glinet routers these are openwrt which is an opensource firmware basically. on them theya ready come configured with vpn adguard and everything. i have it so that is 2 different wifis like you said home and the glinet one but i use it as a vpn in my home with ddns or proton vpn for say Switzerland. it has a switch and i set as left side being home and right vpn