Okay, so David has a strong background in sales and marketing, which is a valuable skillset. However, his specific skills in the beverage industry, such as wine tasting and pairing, may not be as in-demand as other professionals. Location in Suffolk County, Massachusetts, may also impact his earning potential. Considering his experience and skills, I estimate his hourly rate to be around $75, which is on the lower end of the scale for sales and marketing professionals. This rate is also influenced by the fact that his skills are more specialized and may not be as widely applicable as those of other professionals.