That's the thing man... everyone wants to be self employed and open their own business... until they actually do it. You think you don't have any free time now? You certainly won't have any more when you're trying to get a new business off the ground. It's an overwhelming amount of work.. you have find clients, manage expenses, get insured, and that's just the tip of the iceberg.
I guess my point is... most people don't realize that opening your own business is FAR more work, time, and STRESS than just working for someone or a corporation. You also won't get some of the nice benefits companies offer (401k, health insurance, etc). At least initially, if you don't put in the hours of extra time and effort, your new business WILL fail... that's why so many of them do. Alot of it is luck too.
I'm not trying to be a downer... but dude starting your own business is not something you casually dive into. You really do need to do your homework and have a sound business plan... even then, nothing is guaranteed. It takes alot of money to open a business. If you fail, then you're in debt. Also, the economy being what it is today... right now is one of the worst possible times to go into business for yourself.
If I were you... I'd research a little more, figure out what you REALLY want to do... and wait for the economy to improve a little bit.