Writing a Restructuring Plan for a software

Hey, we are a small team of 3 web developers & designers, and 1 of our guys is a .Net developer, we wanna build a software for a company in our country, a software is alike "DropBox" something like this, with less & more features, so we are busy now in building a web-based CMS for a university, we are searching for a talented programmer/developer to write for us the Software Architecture, to write from scratch about how long time do you think it will need and how many programmers it needs as you see, you should mention all the modern technology and software environments we should use to start, what we should build and use and you should numerate them as : 1) start to build the database 2) start to build the script of connection between database and member user. 3)... etc another important thing that the software also have to have a members accounts, every member can store his files and to sync them from anywhere ! and by the way we are searching for a talented .net programmer, so we hope to work together, have fun in writing this architecture, it shouldn't be lot of papers, we want something comprehensible and hitting the point.