Okay, let’s tackle this. So Simin has skills in interior design, sales, and marketing, which are in demand. However, her role seems to be more focused on design and staging rather than high-level business or strategy. Location is Mission Viejo, California, which is a relatively affluent area. Interior designers with similar skills in the US can charge around $50-$100 per hour, depending on experience and location. Given Simin's skills and location, I estimate her rate to be around $75 per hour, on the higher end of the range.