NETWORKING: Start as Host if no Host; Otherwise Start as Client

Topic says it all. This is a simple versus game. Two players, Host and Client. I don't want to use the network HUD, I want the game to automatically connect. If you're the first one there, you should connect as the Host. If there's already a host, you should connect as Client.

Alternatively, if there's a way to check the IP address of the current location, then I can set to only Start as Host from MY IP and everyone else starts as client.

(Aside: I do not want to have a server only version running, as that seems like unnecessary overhead for me to have two instances running, the Server and my client, when I can run one as a host, and let my buddy connect as a client. Just need a way to make sure we're both not clients or both not hosts!)