If I am not mistaken, and someone please correct me if I am wrong, I don't think you can just take the test. You are required to be sponsored by someone. The days of taking the test and 'hanging your shingle' are gone.
However, there are a few places where you can work essentially part time -
http://www.worldfinancialgroup.com/c...t-by-yourself/ - is one. Bear in mind you will have to pay for Errors and Omissions insurance - a few hundred bucks a year (at least). And, even though you may not necessarily do every trade with your own broker (for example, day trading or forex), you do have to report every trade to your compliance officer. Plus anything else with even the remotest connection to any other firm in the securities industry. Your compliance officer may even prohibit you from doing things (like viatical life settlements), even if it is on your own time.
Also, you will probably need the Series 63 exam also, but if you can pass the 7, you can pass the 63. One more thing - you will probably need an insurance license from your state, and you probably will need 60 CEU's to renew it in two years.