http://i255.photobucket.com/albums/h...Jermz/Oahu.jpg
I think anywhere in the highlighted area would be perfect. Our island is only about 45 miles long so if the school was located somewhere in the middle it would only be a short drive no matter where you're coming from. As for affordability, I think this area would also be pretty good. Theres a lot of industrial property you could lease. Here's one example in the Waipahu/Waipio area >
http://www.loopnet.com/Listing/15833...et-Waipahu-HI/. I don't know ecxactly what kind of price range is affordable, but one of the Gracie Barra schools is located in one of those buildings... Like Scott said, Oahu has the largest population of the Hawaiian islands and EVERYONE here trains. Jiu Jitsu/MMA is a big deal in Hawaii so you don't have to worry about people being interested. 10th Planet is THE best form of Jiu Jitsu IMO, people just need an opportunity to experience it.