Batman (creative franchise): How much start up money would a novice super crime fighter need?

As a shortcut, consider Bruce Wayne (Batman) and Tony Stark (Iron Man). Forbes ranks the wealth of fictional characters, with Wayne worth an estimated USD $6.5 billion and Tony Stark worth an estimated $9.3 billion. http://www.forbes.com/special-report/2012/fictional-15-12/fictional-15.html Now, neither Wayne nor Stark sank all their money into their superhero ventures. On the other hand, you need to consider that both Wayne and Stark run/own high-tech companies from which they appropriate (misappropriate?) cutting-edge tech, which saves them money and time.

This would depend heavily on (at least): Does this would-be 'superhero' have any real innate super powers? Are there other superheroes or wanna-be's in the vicinity, and would they like to band together? How much territory said hero wants to protect? What's the timeframe within which this person wants to become a superhero? How the answers would matter: Any super-human power is worth something, and while your hero probably don't want to spend all the super-mojo on making money, not being broke on a regular basis would be nice -- just ask Peter Parker. Joining forces as well as joining assets is almost always beneficial. Sure, JLA mooches off Wayne and the Avengers mooch off Stark, but Batman and Ironman probably gets to funnel any tech leads the group discovers into their company. Small territory = probably can patrol on foot or a light vehicle, but if you want to protect the world and you can't run/swim/fly at supersonic speeds, you will need a sweet ride=costly. The old adage: Time = Money still applies. Although, Mark's answer to  would indicate that you don't need much money (but about 15 yrs of hard work).