A RPI (3) that will connect to any network with its onboard wifi
open a vpn tunnel thru it (ya need a vpn)
create a hotspot (ya need a usb-wifi stick)
and route all the hotspot trafic thru your vpn
A prefect solution for servers, cameras, hiding anything anywhere
the solution here use openwrt.
the setup is realy clingon style, but i put the copy-paste "fancy scripts" in the comments.
I did it, it works fine... and fast
https://www.youtube.com/watch?v=jlHWnKVpygw