build a magneto marketplace

I’m looking to expand out a current blog site into a transactional market place. Top level requirements are: Built using Magento go Wordpress plugin operate as a ‘market place’, therefore allowing other 3rd parties upload products without administrator being involved e.g. etsy, amazon, ebay All 3rd parties who upload to have restricted access, i.e. only access their products, not other sellers 3rd parties able to remove products without administrator involvement Products to be uploaded using a generic form Allow sellers to upload product imagery When listing, display my sites commission charge Product feedback rating system Private emails and communication between buyers & sellers Build in content spots on all pages for SEO copy To be considered, I’d like financial and time estimates but also examples of similar projects you have worked on.