OpenCart Installation and Store Setup

General information for the website: Selling online different products related to health and medical Description of every page/module: Standard e-Commerce store. We will provide you the details of the products and categories and other stuff. We are considering OpenCart due to its small size for servers and wide range of support from freelancers and modules. Please suggest if you think if there is better open source available. Description of requirements/features: Need to setup store in OpenCart without changing in core, codes, etc. Following are required: 1- Setting up categories and sub-categories and Sub-sub-categories 2- Setting up Products Specifications so that products can be compare 3- On the basis of Specifications, suggestions to narrow down the search option (Size, Manufactures, Color, etc). Also, you need to explain us as in future, we should be able to add/remove the features/specification parameter/variable 4- Little bit tweaking in layout to show the products As a sample you need to setup 20-30 products. The rest we will get inhouse to input the data. Please quote your best final price. Thanks Payment methods: Credit Card, Paypal Extra services needed: Installation Extra notes: