Okay, let’s tackle this. So Jonathan Sandberg has 44 years of experience as a small business owner and interior designer. His skills like interior design, installation design, and marketing strategy are in demand. Location is Greater Philadelphia, which is a moderate-cost-of-living area. Considering his extensive experience and skills, I would estimate his hourly rate to be around $125. This is slightly lower than average for an interior designer or entrepreneur in the US, but his 44 years of experience and long tenure as a small business owner suggest a more conservative approach.