Here's a link to a job search site:
All Nurse Jobs in Oahu, HI | Indeed.com
There is quite a range of salaries as you can see in the upper left corner of the web page. You mentioned, however, that your wife will be in school for another 2 1/2 years, so I presumed that she would be at the entry level, more or less, when you move here.
The local papers (Honolulu Star-Bulletin and Honolulu Advertiser) have decent classified ads on their sites that will give you current info, too.
I didn't mean to be a downer.