A car like that, or to that concept, will be very much in vogue in the coming 3 years on the Winch Challenge circuit. Howveer, we are in for a creative time with the DVLA etc as many event organisers do require cars to be taxed and MOT'd, and you are often required to bring your MOT certificate with you to scrutineering (not that we've ever actually been asked to produce it, but they have often just looked at tax disc).
Weight is the next great frontier in Challenges...