Hi,
Experienced system administrator with a lots of background in vpn. I can implement this kind of setup for you. What exactly do you mean by "Setup must be able to connect from 3 external IP Address" - the services to be whitelisted for connection only for 3 specific client ip addresses, the services to listen on 3 ip addresses on the server, or vpn internet browsing to go out from 3 different ip addresses on the server? Please clarify. Also didn't understand if the project includes setup of the radius server or the radius server is already setup.
Regards.