City government seeks software for room rental and event management

We are a county seat and are looking for software for room rental and event management for our private services.

This software should meet the following requirements:

• Plan, organize, budget, and calculate events, as well as review them...
• Allocate (rent out) a large number of rooms and room groups
• Book staff, equipment, tableware, etc.
• Settle project accounts
• Generate invoice attachments for the city’s financial accounting department
• Draft contracts
• Manage resources
• Utilize a complex pricing system
• Synchronize with Outlook calendars
• Preferably not web-based

Eight software workstations should be usable simultaneously, but the software should be installed on approximately 16 workstations.