Hi Sharon,
Please don't go to a breeder! In the US there are so many sanctuaries for potbelly pigs, and those who get "too big" are dumped there. Just look online- Pig Placement Network lists animals from all over. Breeders just make the problem worse by promising ten pound pigs.
Benefits of an older pig include that he is already full grown at three years & socialized. Plus he will be extremely grateful for a herd of his own. If you are zoned and have a fenced in yard that he can root in, then it is feasible to have a pig. There is a lot of learning before getting a pig, much like what I am seeing on this forum about birds. (I want one too, bu my family says one exotic is enough)