I'm certainly not telling Christo anything he doesn't already know...but a couple challenges selling new KKs here stateside:
Currency volatility. During the past 24-months the US/AU currency exchange rate has fluctuated from a low of about 60-cents on our dollar to almost even; its difficult to impossible to wrap a business model around uncertain costs; especially given what quality trailers cost.
International freight costs; crazy expensive. Then the transport costs getting them from the few ports on each coast to enough dealers in the USA so folks in a given region can see them in person.
Profit margins are too slim given their incredibly low sales volume here in the USA. I looked at this, when Redline and I brought ours in in 2008, and it just doesn't make fiscal sense.
And lastly there's the $20k+++ price tag. Americans typically judge value by "bigness". Very few Americans actually place a high consideration/value on top notch construction and materials that won't fall apart after the first year's usage (outside of our little niche ;-).
Due to a variety of factors - major contributors stateside like Adventure Trailer, Overland Journal and many, many other pioneers like them have increased our awareness - we are getting more exposed to the off-road vehicle based lifestyle here in the USA. This lifestyle, if you will, has existed for decades in other parts of the world. Call it the snowball effect or call it anything you want but there is more groundswell interest in vehicle based off-road exploring and camping than other time in recent USA history.
Interestingly enough although in my opinion the Kimberley Kamper campers are at or very near the top in terms of quality construction and overall design engineering they are but one of 40, 50 or more similar manufacturers of this type of trailer in Australia!