You can tow it with a car
Not all Australian Touring Caravans weigh 8000lb, there are lightweight single axle models, like this 4,200lb , 22ft version that can be easily towed by a car.
Forum Discussion
Not sure the Al-Ko or anything like it is being used by any N. American mfr.s - I'll be interested to hear if you do see it at the Seattle show.