Okay, let’s tackle this. So Dennis Tacchi has 41 years of experience as an architect, which is extremely valuable. He’s the owner of his own firm, which indicates a high level of autonomy and responsibility. Skills like design research, sustainable design, and renovation are in demand, especially in the Greater St. Louis area. Considering his education from a reputable institution like Washington University in St. Louis, and his extensive experience, I would estimate his hourly rate to be around $250. This is slightly lower than what I would expect for a more senior position, but still reflects his unique combination of technical expertise and business acumen.