Opening a business DOES require a lot of work, in fact, it requires a lot more work than working for someone. BUT, the reward can be very much worth it. Besides the monetary reward there is also the emotional reward and satisfaction knowing you're your own boss (except for clients).
First thing to consider when you open a business is to decide WHAT TYPE of business you want to open? Preferably you should open something you know something about, although this isn't required.
Second thing is to determine if there is a need for this item/product/service.
Third, you should start the business while you are employed. Businesses generally don't make money for the first 6-12 months of opening (that's when they make money at all) and you still need to pay the bills.
This should take care of the next 12-18 months. Do a LOT of research and be realistic on your ability and your chance of success.
Good luck!
