Woo Commerce Futter/Ionic app customization with dokan/wcfm

Hi I have flutter app of woo commerce, i need customization in app Read below before bid please Model of this project is: This is a online store for cloth manufacture, but he will not sell online its just for stock availability. There is 1 manufacture --> 15 Whole seller --> (n) number of Retailers Manufacture sell his product to whole seller and whole seller to retailer What i need: 1. Manufacture upload all his products with stock availability Whole seller will can also update his stock availability. Manufacture can check his whole seller stock also 2. Manufacture can update stock from website (no need to add in app, if you can then well and good but will not pay for this). Whole seller can update his stock as well. 3. Retailer have to register before placing order, Retailer have to give his whole seller code before register on app/website, and then he will assign to his whole seller account. 4. When Retailer placed order, one notification/email/sms sent to whole seller and manufacture. If Whole seller don't have stock if that item/items then whole seller will get notification that "you received order but its out of stock". and Manufacture get notification your 'name 'whole seller get order of this item, but its out of stock. So that Manufacture can contact whole seller. Price will not show to anyone. Stock will show to Manufacture (his, whole seller & retailer stock). Manufacture can see his and retailer stock & retailer can see only his stock. we can use Dokan/WCFM Plugin or Multi Vendor Plugin of Woo Commerce. If you want to use another cms then we can use Opencart also i will provide you flutter app code also. Ionic can also be used for this. as i need hybird app (Android & IOS) Suggestion are welcome Budget is low for this app customization I have 5 more project after that from same client and that are big projects, so its time to make good relation ship