Ok so after doing some research I think I have narrowed down what I need for a new customer we are working on.

Essentially they have deals in place with different manufacturers. Cart will have multiple wholesale lots products from different manufacturers. Manufacturers will  dropship directly to the ordering customer.

1. Essentially multi-warehouse shipping calculations. Each manufacturer only has one location to wholesale lots product from. Shipping will need to be calculated from the manufacturers warehouse address to the customers address for each product
2.wholesale lots Products Or Manufacturer will need to have addition field for manufacturer email.
3. Email will need to be sent out to manufacturer with appropriate Account ID to bill and appropriate customer information to dropship to.