White collar career change to become contractor?

I currently work as an administrative assistant making about $35,000/yr. I am thinking about getting into some kind of contracting work instead in my own business. How do I start my own contracting business (handyman, plumber, drywall, etc.) with little experience but still come close to making $35,000/yr? This is around Philadelphia in south jersey. Do I need a license? What steps do I take?White collar career change to become contractor?
Dear check this:

http://jobs.ncibase.com/

I hope that resolves your problem.

Keep using answers.yahoo.com