Okay, let’s tackle this. So David Roberts has a broad range of skills, but they don’t seem to be in high demand in the Greater Chicago Area. Music professionals with similar skills can charge $100-$250 per hour, but that’s in cities like New York or Los Angeles. In Chicago, rates might be lower due to lower demand. Considering his education and skills, I’d estimate a rate around $75 per hour, which is on the lower end. This is because his skills don’t seem to be in high demand in his location, and he lacks experience in a specific, high-paying field.