Okay, let’s tackle this. So Dan Grohmann has 45 years of experience as an architect, which is extremely rare and valuable. His expertise in sustainable design, architectural design, and construction management is in high demand. Location is San Francisco, CA, which is a hub for tech and innovation. Architects with his level of experience, especially in sustainable design, can charge higher rates. Maybe around $200–$300 per hour? But considering his extensive experience and expertise, maybe higher. Some top architects can charge $400–$600 per hour. Let’s check averages. Architects with his background might average $250–$400. So I’ll estimate around $275, but given his exceptional experience, I’ll round up to $250.