How is making 3 kilometers wireless antenna

Best bet is to get a router with a detachable external antenna, then buy an amp, then get a dish and hook it up.

Do this on both ends and point the dishes directly at each other.

This is simplified, but you can google the extra info on setting stuff like this up.

Obviously, you can move around because thee dishes have to be pointing directly at each other for them to work; but it's a cheap way to connect two distances easily.