Crowdsourcing Website

I need an online e-commerce crowdsourcing website similar to [login to view URL] built using the Joomla Platform (or the most suitable one, My web server is compatible with MySql, PHP5, Perl, Java, JSP, C/C++, CGI, XML, Cron jobs, Python). You would need to install the system onto a third-party server, build the site using modules, extensions, etc. available within the Joomla community. All the server access information (Such as FTP account) will be provided. It's pretty much a copy of the [login to view URL] functionality, so please take your time to navigate throught it and understand how it works. A detailed site outline with desired functionalities will be provided. Below is a highlight of some of the site requirements: 1.) Ability to restrict access to the site, making it an invite only proposition 2.) Different types of registered users- Clients who post projects and voters/buyers- with restricted access to their respective area. Then for each user type it would be possible to set up different layouts, widgets, etc. while creating a bridge between the two for items submitted and voted upon. (By doing this, the site can then offer different supporting services for the submitters and the voters/buyers/contestants.) 3.) Ability to create a subset or design categories of all proposals and hold competitions in which voters decide which is best within each proposal subset 4.) Make submission of photos possible (the ability to be private so the client who postes the project will be the only one able to see the image designs sent by buyers/contestants), enabling voters to decide which photo is best within each competition 5.) Make it so that winning items of each competition can be purchased. The website would need to be able to connect into third-party payment and transaction engines such as PayPal and other payment gateways that don't involve credit/debit card use (Money transfer). 6.) Site management system for me to use to administer the site 7.) I need to be able to translate it to spanish by changing .ini files. 8.) As I mentioned before, pretty much a copy of the [login to view URL] website functionality and business model. Please email demos with price. Looking forward to see your offers!