As a member of the Institute of Luxury Home Marketing I have the resources to provide graphs to illustrate the status of the luxury market on Kauai. The top 10% is considered the luxury segment of the market and on Kauai that starts at approximately $2,000,000. 

Here is the current statistics for the luxury market based on data gathered from February 12, 2008 to March 24, 2009. Feel free to contact me if you would like more details.