BuddyPress.org

Dear all,

I am using buddypress as a circle of friends based platform, to arrange and discuss actions, like going Bowling or Hiking.
My plan is, that every group member has the chance to click “attend”, “not decided yet” or “refuse” in a topic. Afterwards the username and his answer will be displayed below the main topic entry. So every group member can see, who will (not) attend the action. Decision can be changed by the member.

Is my request clear to you? Is anybody able to create a plugin? What’s the price?
Thank you in advance!!