If you're looking for a VPN to hide your "grey" activity or to get round geo-locking I can (highly) recommend VPN Unlimited from Keep Solid. They often have special offers on subscriptions making their price unbeatable. Their plan allows for up to 4 devices at a time (IIRC). [VPN Unlimited - Fast & Secure VPN service](https://www.vpnunlimited.com/) On the other hand if you are looking to "phone home" or set up a small system for itinerant users you can try Softether VPN which is very easy to set up and maintain, and is completely free - however they currently have a bug for android clients, but with a workaround. [SoftEther VPN Project - SoftEther VPN Project](https://www.softether.org/)
So old that I did my first coding in octal via switches on a DEC PDP 8