Elon Musk is the real-life Ironman, and exactly the sort of superhero we need – because he puts the lie to the tired old cliche; ‘jack of all trades, master of none’. In this post, I want to make the case that cultivating broad interests and skills not only dovetails perfectly with the frugal life, but acts as a sort of force multiplier – a booster rocket that can propel you towards your money goals at blistering speed…