The Nelson's can already build a $20k car they really wanted to within the rules. Some would suggest that it'd break the "don't be a dick rule" but I'd argue that I'd be the opposite of being a dick. Again going back to the idea of racing for pink slips, say that upon winning against a local person, instead of taking their car, the Nelson's offered to trade the loser's vehicle back to them in exchange for a specific allotment of parts that's less than the value of the vehicle that they just won. That's actually being quite kind and benefits the person whom just lost their vehicle. And I still believe that it potentially falls within a loophole within the rule set. I do expect that if someone were to ever take advantage of it a new rule would be written in their name to close the loophole, however I'd love to see it happen. The story alone would be amazing and I'd fully expect that it'd bring a new level of attention and exposure to the challenge as an event.