Okay, let’s tackle this. So Fred Stern has 53 years of experience as a Principal Architect, which is a senior-level position. He has a strong background in construction management, leadership, and interior design. Location is Avondale, Arizona, which is a mid-sized city in the US. Considering his experience, skills, and location, I would estimate his hourly rate to be around $150. This is slightly below the average rate for experienced construction managers in the US, which can range from $200 to $400 per hour. However, Stern's 53 years of experience and his expertise in green building and construction management justify a lower rate.