Try using one of these for your VPN setups

GL-AR300M series Routers WiFi
Openvpn is already installed in the software
Cost around £20 -£30
Easy to set up
Use the Wan out of GL into the Lan in on your home router.
Lots of ways to config.

I am using PIA
Just download the OpenVpn config files and upload to the router in the openvpn tag on modem.