Why not do try it with your interest in pen testing? Well here's an article dealing with some of the pitfalls that you might face when trying to do just that.
Permanent Link: [Article]-Pitfalls of a Home Based Ethical Hacking Business
By EH-Net Member Cutaway, GSEC-G, GSNA-G, GCUX-S, GAWN-C, and CISSP
Self-employed security professionals, or those who are involved with small businesses, will invariably find themselves conducting security assessments and penetration tests of Internet facing systems and services. These activities will happen through resources that are generally not as robust as those supplied to security professionals in medium and large organizations. The following is a list of a few items that a security team should take into consideration before performing security related activities under these conditions.
Many thanks to EH-Net Member Cutaway. Be sure to ask questions and leave your feedback.