Custom K2 functionality

I'd like to have quotation for the development of a component like the on found in (please remove the "---" from the following link) [login to view URL], named My Paradise. I'm not really interested in the camera stuff you get when you click on Get Started. Instead, I'm interested in the functionality of "Add to my Paradise" you get when you choose places (follow the "Where to go" option in the main navigation menu). I'd like to have some kind of "shopping cart" like that, just for places. I want to be able to browse some places and add/remove them to "my paradise" (most preferred using ajax, like the site I refer) . (Note there is NO need to be logged in to "add" places. The "save my paradise"option would keep the same, you must be logged in to save.) I'd prefer (but it isn't mandatory) if you can develop a k2 plugin for this (or a module ??). Also, when you click on "My Paradise", you get a list of the places you have chosen. But it's not a simple list, but a list of items, with picture an intro text. Also, please check the map component on top of the chosen places page. You can show (mark) on the map where each selected site is located. Please, I'd need a formal quote, terms and development type to perform something like that, using K2 instead the default joomla's content manager. I'd prefer to receive quotes for the "shopping cart" component and the map functionality separated, as two different but complimentary developments. The development would be for Joomla 1.5. Much better if possible to make it compatible with 1.7 too. Best regards