Event organizer seeks event management software (including room planning)

We are an event organizer in the cultural sector and are looking for event management software (including room planning). We organize a variety of events, e.g., readings, musical theater, company and family celebrations, music concerts, etc.

The solution should meet the following requirements:

• Contacts and CRM
• are stored in iCloud (in groups) and should be synchronized
• Notes on customers and contacts should be automated as much as possible (history of contact usage)
• Contacts must be usable for mailings
• Can contacts be transferred from iCloud to future CRM?
• Schedule and room allocation, room planning
• Interface to quotation creation, invoicing, and contracts for room availability as a resource
• Personnel planning
• Staff attendance at events
• Technician times
• Cleaning schedule
• Appointments and attendance
• Previously in iCal calendar
• Project management tool (temporal sequence and important information about events, attendance)
• Link to quotation creation?
• Link to personnel and helper schedules?
• Scheduling (schedule plans) for events exportable in different variants?
• PR, marketing
• Addresses and contacts for New Year's mailings from CRM system
• Contacts in history in CRM?
• Quotation creation, invoicing, and contracts (merchandise management system?)
• Resources (equipment, personnel, technical equipment)
• Quotations
• Contracts
• Invoices
• Reminders
• Preferably on-premises, local installation

Five software workstations are planned. macOS and MS Windows systems will be used.