At the grand old age of 47, I'm not anywhere near old fart age. As to proving it to the world doing a cruise from NC to Fl doesn't prove it; my neighbor just went Annapolis to Key West (where he is still hanging on a ball). He's mid 70's.
Second beezer's opinion re: wifi vs wireless. If it's for love or money wifi is not the way to go, get a wireless card and subscription service that meets your needs.
There are a couple of good threads here on sailnet that talk range, availability, equipment and costs. Simply search for them and all will be revealed.