It will depend on how much extra money you need; I am currently registered on a site called bubblews where you can make a few hundred dollars easily if you have the time to interact with other users. I have been managing to make some extra money from this site comfortably having fun as well. Check it out and find out if it will work for you.
It depends on what kind of business you are trying to start so maybe see what it is you want to do first. Since the invention of the Internet things have been easier to start a business online or off line. I mean you can setup things with website builders that have a ecommerce function. Just get all your info first and then see if this business is right for you.
