How long would it take to WALK from Miami, Florida to Louisville, Kentucky?

My aunt is putting together a power walk for this Summer for her and other people we know because we have some extra weight on us. We’re planning to walk from Miami to our hometown of Louisville Kentucky. I know the driving time is around 16 hours, but how long would it take to walk?

14 days, 5 hours, according to google maps. This doesn’t take into account any stops for food, sleep, or restrooms. It would probably take about a month.