Gohighlevel to QuickBooks Invoice Sync

We’re looking for a GHL expert to build a custom integration between GoHighLevel and QuickBooks Online. The automation should create an invoice in QBO every time a product or service is sold in GHL, supporting both single-item and multi-item purchases. The integration should ensure item consistency between GHL and QBO, including automatic creation of new products in QBO when necessary.

Key Requirements:
1. Add individual line items for multiple purchases in a single QBO invoice.
2. Handle discounts and ensure total invoiced matches.
3. Match taxes and search for customers in QBO before creating new ones.
4. Invoice numbers must increment correctly.

This is an urgent task, and we prefer a quick solution for V1, with potential for a V2 custom app later.