I'm Brazilian and live in northeast 800 km south of Cumbuco.
City: Recife . State: Pernambuco.
I have never been in Cumbuco but I have a ideia about cost of live.
I'm far away from retirement as Im 35. But if I have to choose today a spot to live as a retired, Cabedelo -Paraiba will be in my number 1 of my list.
Cabedelo is 15 min from Joao Pessoa, one of the smallest capital state in Brazil. Life over there are calm , people are polite , you have a infrastructure for you wife go to a Mall, lots of restaurants, gym.
The wind range is 9 to 13 knots most of the time off season. And on season 11 a 15 knots. If you have a foil board and a light wind kite I can assure you at least 1 or 2 times per week you will be on water.
If you have interest i can film the beach and show how the spot is.
How about cost of living here
healthcare insurance: 1500 reais per person até 65 years old. Here it's necessary have this , public hospital are suck.
Food : 1000 reais for months per person .
House or apartment , ocean view : 700k - 1000k reais
House or apartment : 100 m² , 400 m away from the ocean 300-500k. If you rent 3k to 5k with taxs.
Resume: To live a great life here it's necessary 25.000 reais per month. 5k USD per mouth you will be rich here .