Based on the skills listed, I'm estimating an hourly rate of $75. This is a relatively conservative estimate considering the skills listed are in high demand, especially in the nonprofit sector. Public speaking, leadership, and marketing are valuable skills that can be applied across various industries. However, the rate is lower compared to professionals with technical skills like software development or engineering. A more accurate estimate would require additional information about Michael's experience, education, and specific industry demand in Cambridge, MA. For the sake of this example, I've based the rate on national averages for marketing professionals with similar skills.