Okay, let’s tackle this. So Frank has 12 years of experience as an interior designer, which is a solid amount of time to build skills and expertise. His skills like Autocad Architecture, Architectural Drawings, and Space Planning are in demand. However, his role as a Designer at Innerspace Custom Closets and Storage Solutions is more focused on residential design, which might not be as high-demand as other fields like commercial or industrial design. Location is Miami, Florida, which is a relatively expensive area. Considering his experience and skills, I would estimate his rate to be around $75 per hour, which is on the lower end of the scale for interior designers in the US. However, this is still a reasonable rate considering his level of experience and the fact that he's working in a specialized field like residential design.