No need for a separate a/c if you use a wireless router.
I have a son also using Aol who did just what you want to do.
He's a bit of a clever-clogs in his own way. Bought the router for a lot less than £55 and had no trouble setting it up.
From memory I think you need to be careful which router you buy, obviously Aol will not help you sidestep their wishes!