Event Management Software

I need a type of project management system for creating and managing Tradeshow events. We'll host the final product on our own server. It must be visually pleasing and user-friendly for both the company and clients. It must be an all-in-one system that my team can use from start to finish for making events happen. Everything must be interconnected so that the same information doesn't have to be input into each department. Information that affects other parts should automatically populate and/or update those other parts. Duplicates and double-bookings should be caught during input. The software must be secure for the private data that will be input. I need to see a sample before I move forward on this project. I'm glad to answer any questions you may have, and I need you to be willing to discuss features in order to get things right. The finished software must have these features: Customizable branding Unlimited company users Unlimited Vendor users Unlimited Events Reoccurring events Updates in data should be time-stamped and attribute a user name Booth registration (customizable booth size options) Wait lists for full registration Add-ons to registration purchase Registration needs to be accessible by both Vendors and our company's staff - we do some over the phone Need to be able to transfer a Vendor's registration from one event to another seemlessly Vendor accounts should show everything they've ever registered for, even if it was within different events Taking payments (CC, electronic check) - Can be an integration of other services Automate refunds Need to be able to claim a payment as made if done outside of software Invoicing - preferably integrated with QuickBooks API Floor plan mapping Assign vendors to booths on map in real-time Vendor log-in to register, update info, pay, sign docs, upload docs, make public listings for event website Contract signing Waiver signing Upload required licenses/permits Entertainment scheduling for event days and different stages/arenas Speaker/Demonstrator profiles connected to registered Vendor Budgeting Checklists of necessary tasks with Deadlines Ability to assign tasks to other staff members Ability to assign tasks to multiple staff members Calendar view of tasks and events - preferably integrates with Google Calendars and others Packing lists Vendor Check-in at show Vendor badge out-put based on registration info Sending Vendor Info Packet to Vendor accounts and emailing updates Surveys for vendors Track booth inventory, material needs, and presentation requests Reporting on Vendor demographics, budgets, payments, etc. Easily create report of all logistical and vendor data and contact info for each event Integration with our CRM Soffront API Integrate our Slack Instant Messenger team group API for collaboration Integrate each event with its website and social media pages Need to be able to create of template of Check-lists, Tasks, Deadlines, Packing Lists, Entertainment Schedules, Contracts, etc to easily create each new event Publish the vendors listings on our event websites Publish the entertainment schedules on our event websites Publish vendor-populated interactive maps on event websites Possibly integrate with with a mobile app version of system Possibly integrate with a public Event App for fans