Okay, let’s calculate this. Serena has 22 years of experience as a small business owner, which is a significant amount of time. She also has a strong background in coaching and leadership development, which are in demand. However, her experience is mostly in a small business setting, which might not be as lucrative as other industries. Considering her skills and experience, I would estimate her hourly rate to be around $125. This is slightly below the average hourly rate for coaches and entrepreneurs in the US, but it's still a reasonable estimate given her unique combination of skills and experience.