CRM platform creation

I'm looking to create a platform for wedding planners like me. It needs to have:

•Calendar syncing
•Invoicing
•Add to cart products and services
•Contracts and e-signing
•Templates
•Integration with Stripe, Zoom, Gmail, Zapier, Mailchimp.
•Leads capture and tracking
•Forms
•Proposals
•Booking services available from calendar
•Branding
•Inbox
•File sharing
•Galleries
•Milestone tracker
•To do list
•Calendar conflict alerts
•Reminders
•Flows
• The ability of clients to upload their guest list, along with their selection from the menu and once in the system, those names can be drag and drop into a seat plan. Then save progress or export pdf version. (This is a feature I'm very much interested in)

The planner Dashboard + Client Portal + Vendor/Supplier Portal

Please get in touch if your skills match this project and please offer an estimate.

Thanks in advance

Tali