Pandemonio - Details Attached

I am a former product manager for large corporations which have decided to start his own venture. Right now the venture is finance by myself so I am looking for a minimum viable product (beta) that leverages as much as possible free or unexpensive resources while not compromising the project for the future. I am looking to develop a site (responsive) and possibly followed by an app that enables users to create vote and rate their own proposals for different topics. Please look at the product requirements and main wireframes for more details.