The problem with the Brute kit ($9000) is that you can't stop there!
There's big suspension and tires, axle upgrades (how about portals?),
the highline fender and heat extractor hood, the Hemi or diesel, new
bumpers, and so on.
I think it's more practical to start with the J8 MILSPEC diesel two door,
estimated cost $60,000. Then make the Brute cab fit, and add the camper
of your choice. Figure maybe $75,000.
A less expensive option is the Flip-Pac that Adventure Trailers is designing
to fit the Jeep JK. Just buy a Rubicon model, put the AT Jeep Flip-Pac on top,
and you're out the door.