If I understand your question correctly you’re essentially asking for fully featured eCommerce in HubSpot, pricing tries, past orders, user permission access to certain products, etc.
At this point, Commerce Hub doesn’t provide what you would traditionally call eCommerce functionality, shopping cart, discount codes, etc. In the past HubSpot customers needing eCommerce stores and shopping functionality have had to set up separate platforms and integrate these platforms back into HubSpot. There is obvious pain with these integrations, which you may have experienced, particularly for B2B customers like you where eCommerce is part of the sales process, rather than as it is in B2C an additional model or function.
If you’re looking for a solution that arguments Commerce Hub and provides eCommerce natively in HubSpot we’ve developed CommercePro.co which is available for the HubSpot Apps Marketplace. CommercePro is a fully featured eCommerce solution that deploys natively on HubSpot. This means customers no longer need third-party eCommerce platforms for fully commerce on HubSpot.
If you want to discuss the details of how we could solve your challenge using CommercePro I’d be happy to walk you through a demo.