Odds of Hanging On
Many veteran Santas stick around for decades. The great news is getting older is almost a requirement for the position. You might just get so carried away by the spirit that you'll want to stick around and do it long-term. If you're good and the kids like you, you can make a reputation for yourself that will help you find work for as long as you want.
That being said, you're playing Santa Claus, the jolly red king of the North Pole. People will expect you to act a certain way—kind, compassionate, friendly, and when you laugh you better shake like a bowl full of jelly.