Magento 2 along with Warehouse management automation

NOTE: READ TILL END AND RESPOND ONLY AS EXPECTED I'm planning to have multiple warehouses across different locations, which will keep the inventory. These warehouses will be used as fulfillment centers by third party websites (clients). Which means I'll get orders from my business customers and I'll ship these orders. All these orders will be received in the form of B2B data exchange [API calls]. I charge these customers based on the time their items were in my warehouse + volume occupied. I may charge them fixed % too. Remember that my Business customers get their orders from Physical store locations as well as their online websites, which are not in my control, so I'll get their orders via APIs. [Either they will provide me API or I'll have to provide them] I use Magento at the moment to sell the items, which I have. I sell my own items placed in my warehouse + items available from other warehouses [which doesn't belong to me], but I do list them on my website via API calls. All orders received are forwarded to warehouse owners and they ship those items. Users can track everything on my Magento. I'm planning to integrate this workflow together and looking for best approach for it [I already know how to do it but I'm looking for better alternatives]. Whoever gives the best solution approach, I'll hire them to implement it. Let me know what extensions would be best in this case. I already have some, including multistore/vendor, drop shipping and so on, so I'm trying to reduce development expenses. Candidates saying lets discuss more in chat will be ignored. I have given all details here, so If you say you have some doubts or need more details, that means you are not eligible to work on this projects and your proposal will be ignored. Please provide your approach in Bid or send it in Private message if you want. I'll respond you, only if I like your Approach. I'll not look into your resume or past work experience, so don't assume I'll get impressed with your resume and will respond you. Key to win this proposal is "Your Approach on How you will solve this use case scenario."