Okay, so Rachel has marketing skills, which are in demand. Nielsen is a well-known company in the industry. As a partner/owner at The Apartment Company, she likely has a strong understanding of the market. Location is Encinitas, California, which is a desirable area for professionals. Marketing professionals with her level of experience can charge around $100–$200 per hour, depending on the industry and location. Considering her expertise in Nielsen, I'll estimate around $125 per hour, which is slightly below the average for marketing professionals in this area.