Search E-Catalog

I want to develop a Main Search website that specifically searches and link items from all the standard e-catalog that we provided to Users. The searched results shall display all the items listed by the Users across their e-catalog for comparisons, review, contact item User, etc. Hence, we need 1. To provide e-catalog template to sign-in Users. The template shall enable Users to take full control and change the product info, prices, product pictures, or even attach digital marketing literature (e.g. Technical Specification) created in PDF format without much hassle All User need to do is login through a browser and they can update the content themselves. The template shall have several function limitation such as Free template shall have limited products to upload. Whereas different type of paid Users can upload different numbers of products. 2. Create the Main Search website that linked to all the e-catalog in (1) This Main website should have a sliding Ad that will display the latest posting uploaded to any of the e-catalog provided. Both websites shall also have space of AD except for paid e-catalogs