I'm working on Sue... she loves to dive, but we've done all of our diving in the Caribbean. It's Oahu this time, and she's open to the idea of moving there. This trip is as much to explore the housing and job markets as to go diving.
Oahu is expensive and not representative of all of Hawaii. Kaui, Maui and Oahu are all pretty expensive. However, on the Big Island you can still get a really good deal and the Island is bigger with better snorkeling, scuba diving. I have done a lot of research into house prices. Since you guy's are nurses though you can live anywhere!