Considering Sidney Furst's diverse skill set, including project management, software development, and product marketing, I estimate his hourly rate to be around $120. This falls within the range of mid-level professionals in the United States, taking into account the location (Ballwin, Missouri) and the mix of technical and non-technical skills. Project managers with software development expertise can command higher rates, but $120 seems a reasonable estimate for this role, given the lack of specific industry demand or location adjustments.