[lime-users] VPN

I would like to finally make my internet at home available to my neighbors over lime. I called my ISP and they made it pretty clear they would take action against me if one of the users accessed illicit content. So I'm thinking about routing all web traffic through a VPN. Is this the most sensible thing to do? Assuming it is, I already setup the VPN server and now I'm trying to connect my lime router as a client. http://wiki.openwrt.org/inbox/vpn.howto https://www.robertkehoe.com/2015/08/setup-openvpn-using-openwrt/ But as far as I can tell, opkg is not installed on the router. What's the best way to install it or install the openvpn client without it?