I just bought a Linksys wireless router for $10 at staples. It is wireless and also has 4 Cat5 ports.
The point is there are serious bargains to be had. You may not need wireless now but if and when you do that means vey little fuss. I bought this one for one of the grand children to have access to their parents computer.

Do not buy Cat 5 cables from Staples or other big box stores because the cost is outrageous. If there is a Clone or small PC repair shop nearby that is a good place to get you cables for half the money. I Buy Cat 5 cable for as little as 2.95 and up depending on the Length.

So you can use the wireless router with or without wires. Hope this helps a little.

Jerry