It really shouldn't be a surprise that Louisiana is so high on our list. The state boasts some of the best nature, food, and music in the U.S., coupled with low taxes. If you're looking for more of a city vibe, then it's hard to beat New Orleans. Around 4.6 million people live here, with 759,000 being 65 or older. Sales tax is 4.45%, which isn't bad, but like Texas, other taxes tend to be pretty low as well.
Incomes are generally pretty low in Louisiana, but so is the cost of living. There are also tons of fishing villages where residents can find amazing seafood for cheap.