Google Calendar & Booking System Expert Needed - Calendar Cleanup and Scheduling Setup

I am looking for an experienced Google Calendar and scheduling expert to help organize and simplify my current calendar setup. Current Situation: I have multiple businesses with separate Google accounts/calendars. I need to view all calendars from one master account. Some appointments are still being booked when they should be blocked. Availability is tied to only one person at a time. I need a clean, reliable scheduling system that prevents double-booking. What I Need: Review my current Google Calendar setup. Recommend the best calendar structure for multiple businesses. Set up calendar sharing between accounts. Ensure all appointments properly block availability. Help integrate or troubleshoot scheduling software if needed (Google Appointments, Calendly, Wix Bookings, etc.). Create a simple system that is easy to manage going forward. Requirements: Experience with Google Workspace and Google Calendar. Experience with appointment scheduling systems. Experience troubleshooting booking conflicts and calendar integrations. Ability to work via Zoom or screen share. Goal: I want separate business calendars but the ability to view and manage everything from one dashboard without double-bookings or scheduling conflicts. Please include: Your experience with Google Calendar and booking systems. Similar projects you have completed. Your estimated time to complete the project.