Wireless is fine as long as you set up WPA2 (encryption). It shouldn't be too hard to set up. Usually with all of these routers you go to https://192.168.1.1 in your web browser. Should be pretty straight forward on how to set it up. Also when you join in any major operating system it will ask for the password and you just save it. This way people don't leech off you.
Trust me, this is easy. If my sister, who can't even hook up her television, can do it. So can you.