Online Multicart e-commerce Mall

Hello, I would like to ask you for an estimation on the following project I am thinking of purchasing a premade php script of a multi eCommerce solution. This script pretty much has everything I could need, but it needs some improvements. It can be found here at [login to view URL] The first thing would be to inspect if the script is solid and can be improved for quality Not all of these ideas need to be done, some might just be too ambitious or impossible to do or not worth the expense. but I would like to know what is possible and the price it would cost for the additions. 1) Aesthetics. A better template needs to be designed for the front store, and a simpler interface. This particular project is presently for Montreal only, so something again the templates for merchants need also to be improved in aesthetics or a few other templates to be added. I figure an upload option in which they can add their own template or background. 2) Delivery: I would like to give the merchants clients to "pick up" or "reserve" a product and have a calendar option to state at which day and time they will pick it up, and to have a "Local" delivery button (optimal if they have a delivery service). Integrate the merchant sites with Post Canada API to simplify shipping. 3) Payments: There are some payment options given but I would like to have Stripe needs to be integrated. A recurring payment system for to take payments from the merchants package. 4) Social media: The script already gives social media buttons ( they need be changed), but it does not give an option to merchants to have their inventory displaced automatically on the networks. (facebook twiter) this might be nice to have. 5) Give the option to merchants to have their inventory to be automatically updated on other merchant sites such as Amazon seller, Ebay. This would be nice but not obligatory since the sight gives the option to export or import products through CSV file. but it would be nice to have that automated. 7) Integrate the merchant templates with a free point of sale system it offers an API ability and it is multilingual. This would allow merchants to have a free POS. 8) Advertisement: add the option for retail tower, mail chimp, and an option for e-mail pop up for e mail retrieval for marketing purposes for merchants. 9) Finally, I would help to set it up on a host. So just give me an idea how much this would cost in total or per feature to program in.