Okay, let's break it down. Mike has 21 years of experience, which is a significant amount of time. He has a broad range of skills, including project management, leadership, and customer service. However, his experience is mostly in construction and customer service, which may not be as in-demand as other fields. Considering his skills and experience, I would estimate his hourly rate to be around $75, which is on the lower end of the spectrum. This is because he doesn't have any specific certifications or advanced degrees in a high-demand field. Additionally, his experience is mostly in a single industry, which may limit his earning potential. To give you a better idea, here are some rough estimates of hourly rates for similar professionals:

* Project managers: $100-$200 per hour

* Construction managers: $150-$300 per hour

* Customer service managers: $50-$100 per hour

So, based on these estimates, I think $75 per hour is a reasonable estimate for Mike's hourly rate, considering his skills and experience.