Last time I was in Hawaii I wanted to take a few guys from my unit up flying...when I called the flight school an older 172 was 155/hr...and the instructor was 55/hr. I told the dude he was crazy if he thought I was spending that kinda money. It wasn't even an SP. He said well this is Hawaii, we are the only flight school on the island and we can charge whatever we want. His attitude itself kinda turned me off. I'd rather went a 172 in the 48 for 72/hr. CFI 25, advanced 35.
In some parts of the states it's very easy to get everything for 20K at an FBO. HI was expensive with just about everything...wasn't impressed. The rental rates for diving were rediculous...took a while to find a place that was reasonable.