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 I'd want to tow a 4500# single axle trailer especially with a light car no matter how strong of engine it may have. My prior trailer was a dual axle 4500# and towed far better than my single axle 2000# popup. Much more stable especially on dirt roads with wash board.