Foodgawker clone with QR code watermark

I need a clone of foodgawker dot com (or pinterest, but with perfectly aligned rows like foodgawker) and I need a simple admin to upload images that link to a url that I input. When uploading a pic / link, I need a QR code to be generated at time of upload that will pull up that particular url when scanned and then overlayed like a watermark in the lower middle of the image. The system simply needs the ability to create categories, the menu on top to choose the categories, and the admin page to add new images. Can be a wordpress plugin, from scratch, or modification of a script you already have to pull it off. Looking for the lowest price to get the job done. Pretty simple project.