As far as where to live, Hickam housing is pretty nice. Living off base is also an option. As far as cost goes, for a pro Comp M/T I paid about $180 for one. Its going to be a little bit more then you pay on the mainland because of shipping. As far as your question about yellow xterras yes there are a few. There are tons of xterras out here. Just most of them are 4x2s. If you do want to get some tires consider M/Ts for the terrain out here if you plan on wheeling often enough.