I see what you're getting at , Jack. But would Her Maj be prepared to appear in this commercial enterprise? No-one would pay to board the Royal Yacht unless the 'Royal' was present. She already makes a mint by charging an arm and a leg to visit a few State rooms of Buck Palace. But a mere boat would need some incentive to command £1000 entry tickets. Maybe the corgis...? Be photographed wearing Princess Beatrice's weird Wedding Hat? Free tupperware cereal boxes...?