I need a shopify developer

Hello. I am creating a shopify eCommerce store specializing in home design products. The head interior designer essentially wants to take her mood boards and make them into a shopify store and the consumer can then buy the product from our site. My big problem is figuring out the shipping and costs. She wants me call each and every vendor that she uses and see what their price structure is for eCommerce. This will be very tedious and I am finding that every store/supplier is different. Would someone be able to help me with this start up project?