Okay, let’s tackle this. So Carl has 10+ years of experience in AV technology, which is a specialized field. His skills in event management, technical support, and audio engineering are in demand. However, his experience is mostly in sales, which might affect his earning potential. Location is Frederick, Maryland, which is not a major hub for AV technology. Considering these factors, I'll estimate his hourly rate to be around $75, which is a bit lower than average for an AV technician with similar experience. Some AV technicians can earn up to $150 per hour, but Carl's sales background and location might limit his earning potential.