How much does it cost to be Batman?

According to Forbes, only about $US 3.5M (plus yearly upkeep costs). Taking into account training, the suit, belt, car, cave, the alter ego and the butler (who apparently costs upwards of $100K) the total comes to just under three-and-a-half with extras for each year of 'cave hire' and 'alter ego' you need (and presumably depending on how economical you are with your batmobile - the 'tumbler' from the movie was 7 miles to the gallon and with custom-made tyres). Together, Forbes costs the alter ego and the car at around $3M alone. So, how economists have fun. (The Forbes slideshow interface is pretty crappy but that's the only way they do these things)