Hello,
Hope you are doing well,
I have gone through your requirement and understood it very well. We have migrated more than 10 stores from 1.X to 2.X.
I have done similar work for jewelry sites, manufacturing industry in past, its done achieved admin level as well as exchange based rate management, you can update from admin panel as well as standard rates We follow the procedure:-
1. We check first compatibility of server.
2. We check php version and required extension enabled to run magento 2.
3. We go through the existing magento 1.9.X store and identify if its followed the proper structure of theme or not. We check if custom functionality is been added and how that custom functionality will be migrated to magento 2.X otherwise it`ll be created again as per magento 2 architecture.
4. We check extensions compatibility
5. We ensure customer, sales data, products data, category data, tax classes, tax rules migration keeping it on top in mind.
6. deployment of new setup without errors to make it go in live environment.
7. check 2-3 days if any error persists to take immediate action.
this is what we ensure and do during a migration.
I have 5+ Years Experience in Website Development. We have build 500+ Website based on Magento, PHP, Shopify. You can have a look on our Profile and Portfolio i`ll share in pmb.
Please come on the chat so i will discuss you more.
I am waiting for your reply.
Thanks
Ravindra.