Okay, let’s break this down. Stephanie has 40 years of experience, which is impressive. Her skills in interior design, space planning, and home staging are in demand. However, her experience is mostly in residential design, which might be less in-demand than commercial or industrial design. Location in Park City, Utah, is also a factor. According to the Bureau of Labor Statistics, interior designers in Utah have a median annual salary of around $60,000. However, experienced designers like Stephanie can charge higher rates. Considering her expertise and location, I would estimate her hourly rate to be around $125, which is slightly above the median salary. This rate takes into account her extensive experience, skills, and location, but is still relatively conservative given the demand for high-end residential design services in Park City.