Can an app allow customers to create and sell their own merch?

[tshirt2020]

Hello everyone,

I made a post before but thought I should be more specific on what I am looking for. We're a factory that produces clothing and are creating a site that would allow us to have our customers create a site and create their own merch in their own dashboard similar to the following examples: 

• Ink Soft (Allows custom websites) 
• Fourth Wall 
• spring (Tee Springs version)

Overall we need the following functionality:

• User are able to create their own account
• They can create their own merch on a sub domain of our main site or pay to add their own domain
• Full software that allows the customer to create their own merch and add it directly to their subdomain
• We would love to show how much profit they will make per item depending on how much they want to sell each item they create.
• Ability to add a payout feature so we automatically payout customers from their sales 

What would something like this cost?