They do sound great for Honduras. The thermal mass of the concrete would be a blessing. What does concern me is the other end. Some of those plastics get britle at cold temperatures. I know that there are a lot of car parts made this way and a lot of testing at extreme temperatures. It's pretty difficult to simulate 10 years worth of heat-cold cycles with rain and sun in less than 10 years. Even with the testing that I know goes on, I have still had cracked dashboards. They are not much of a problem. A cracked plastic house or shed would be. I would be concerned in really cold temperature locations and use wood.