Penha is a compact coastal municipality whose pull is concentrated: Beto Carrero World dominates both the itinerary and the budget, while a half-dozen beaches (Praia da Armação, Praia Vermelha, Bacia da Vovó, Ilha Feia) provide free, full-day entertainment for swimmers and surfers. Outside the park, costs are among the lowest on Santa Catarina's coast—fresh seafood lunches at kilo-style restaurants typically run far below resort-town pricing.
Budget the trip in two buckets: 'park day' (entry, on-site food, souvenirs) and 'beach days' (lodging, transit, casual meals). Visiting in the shoulder months of December, March, or April usually means lower pousada rates, thinner crowds at Beto Carrero, and still-warm water for the Atlantic-facing beaches.