GP, did you follow your own guidelines and inform the user and explain why? etc etc etc
Welcome to the site Mike!
What's the tech question? What vehicle to buy to be able to tow a caravan? That's a can of worms, how big is the van? What's your budget? You could buy a Ford F250 big arse American pickup truck, that will do it easily, but yu may need a fuel tanker to follow you around ! But usually most poeple will gte a 6cylinder 4wd wagon, Toyota Landcruiser, Nissan Patrol, Mitsubishi Pajero etc etc.