Okay, let’s tackle this. So Hilton Williams has an impressive 46 years of experience as an architect, which is extremely rare. He’s been the managing partner at HWA Architects since 1978, which indicates a high level of seniority. His skills in architectural design, sustainable design, and comprehensive planning are in high demand. Location is Sacramento, CA, which is a major city with a strong demand for architectural services. Considering his extensive experience, seniority, and location, I estimate his hourly rate to be around $250. This is slightly higher than the average rate for architects in the US, which is around $150–$200 per hour, but his unique combination of experience, skills, and location justifies the higher rate.