In professional photography taking the pictures is the easy part. The tricky bit is getting the job in the first place and that frequently involves price negotiations. Visit any photography forum and you’ll see more questions about pricing than almost any other single aspect of photography.
Many people who buy a high-end DSLR and a couple good lenses start looking at that camera thinking they could make some extra money taking pictures. If you’re underemployed making an extra $500 on the weekend sounds like an awesome deal, but there are a million things that can go wrong and leave you in financial ruin.