Okay, let’s tackle this. So Thomas Taylor has 65 years of experience as a Principal Design Engineer, which is extremely rare and valuable. His expertise in design and structures, particularly in downtown projects, is in high demand. Location is Dallas, Texas, which is a major hub for engineering and architecture. Considering his level of experience, industry demand, and location, I would estimate his hourly rate to be around $150, which is on the lower end of the scale for such a seasoned professional. However, without more specific information on his skills, certifications, or specific projects, it's difficult to provide a more accurate estimate.