That makes no sense, if he's losing money on every wheel he builds than it doesn't matter how many wheels he makes he's still losing money. If a wheel builder is making money but the profit margin is slim then volume building would make up for that assuming the person is well enough known that he can sell enough to do that. Personally I think if a wheel builder is well known they can get away with charging more for their wheels and not do quite as much volume and be happy.