This rate is quite low due to limited experience and a non-traditional work setup as a self-employed musician. Typically, musicians with similar skills and experience could charge $50-$100 per hour for sessions or lessons. However, considering Robert's skills in IT and security, he might be able to command higher rates in those areas. Without more information on his specific skills and experience, it's difficult to estimate a more accurate rate. For example, IT professionals with similar skills might charge $75-$150 per hour. Given the lack of concrete data, I'm taking a conservative approach and estimating $50 per hour.