Florida has tons of young adults in Miami and the surrounding cities.
So many young New Yorkers move to South Florida, and also Israelis.
I’ve visited South Florida and it’s very very Jewish in some parts — With Hatzloahs on the street corners, rows of shuls and Hebrew storefronts, and totally tznius and religiously dressed women and men on the sidewalks going about their daily lives — plus there are many kosher restaurants.
Florida’s cost of living is also dramatically more reasonable than NY.