Okay, let’s tackle this. So Richard Mcmullen has a diverse set of skills, but they are mostly artistic. I couldn’t find any information on his experience or education that would suggest he’s in high demand or commands high rates. Artists and art educators can vary widely in their earning potential. Some artists, especially those with a strong track record of sales or exhibitions, can earn more. However, without specific numbers or context, it’s difficult to estimate a rate. Generally, art instructors or those working in galleries might charge more than a general artist. Maybe around $25–$50 per hour? But considering his diverse skill set, I’ll err on the side of caution and estimate around $50.