Hi, i'm experienced PHP&MySQL web-developer with strong knowledge of Wordpress (and Drupal). I'll kindly code the plugin as you requested. I know how to create custom post types, taxonomies, and back-end meta-boxes in Wordpress. BUT i'm not sure if Wordpress is the right CMS for this project, it seems to me Drupal could be better, more reliable and user-friendly. Please feel free to ask me any question via PMB.