I need to create a massive amount of records In Zoho CRM. 

I have a data source in Zoho analytics from an FTP server. There are almost 3.5lac records and new records are added every week. I can fetch all the records through API from Zoho analytics. I need to create all records in Zoho CRM Quote-->Sales_Order--->Invoice. 

Zoho doesn't allow to import of Inventory Module records and doesn't support Bulk API.  It is an ongoing process so migration cannot be done. Also, I can create only 100 records per API call. It's a totally time-consuming process It cannot be done in a single day.

Do you have any idea how Can I achieve this goal?

I have attached the necessary Screenshot for better understanding.