Hello. I am looking for different options with some of my ecommerce stores. I know there is a MultiStore addon... But I am not sure if it will work for me.

I am looking to offer sub stores to who ever would register on my website. Example: mydomain.com will list all the customers products that they develope (t-shirts). They will also have the ability to offer their own website such as mydomain.com/customercustom name. They will need to have limited access to their admin section.
Maybe--
-be able to put the prices that they would like
-select what products they would like
-submit their own custom designs

I would make the t-shirts and ship them. But it would be their designs that they are using and I take a % of their sales. I already have the t-shirt equipment.

What are my different options that I have using zen-cart? I want it to be easy for my customers.