thank you for the drupal offer, but not sure how hard is to learn new system, and just for one site ... but if there will be no other way, why not try it
but i still think, that it can be done very easy on wordpress, as all the informations that needs to be generated can be used directly from wp, or from known wp plugins, then just put it on the right place with right css
thank you and keep the ideas or offers coming please