I lived in Hawaii for 16 years, and at one time there was talk about building a park there. It was to be called Castle Park, but nothing ever came of it as far as I know. While tourism is one of the biggest (if not THE biggest) industry in Hawaii, it was thought that the "typical" tourists generally aren't interested in amusement parks. (The tourists from Japan tend to be the honeymooners or others on completely pre-planned tours. The tourists from the US Mainland tend to be older folks, namely, those who have saved up all their lives for this once-in-a-lifetime trip. Not that all tourists fit into these categories, of course.) I doubt whether the Hawaii population could add enough customers for a really big park. Anyway, when I lived in Hawaii, I had to travel to Magic Mountain (before Six Flags took it over) for my rides.