Okay, let’s tackle this. So Lisa has 43 years of experience as an interior designer, which is impressive. Her education from Purdue University adds to her credibility. Skills like Sketchup, Autocad, and rendering are in demand. Location is Sarasota, Florida, which is a desirable area for interior designers. Considering her experience, education, and location, I would estimate her hourly rate to be around $125. This is slightly lower than the national average for interior designers in the US, but taking into account her 43 years of experience, it's a reasonable estimate. Some interior designers with similar experience can charge $200-$300 per hour, but Lisa's smaller firm and location suggest a lower rate.