Quickbooks desktop to salesforce integration

Hi ,

Id like to integrate Quickbooks desktop into salesforce

Quickbooks verison:
quickbooks enterprise solutions: manufacturing and wholesale 20.0
( Desktop )


Goal

We need quickbooks to communicate with salesforce:

New orders created in quick books to create opportunities, product entry (opportunity line item), account and contact

Display inventory list in Quickbooks in Salesforce custom object

I will need to see a proof of concept and an explanation of how the integration will work

Thank you