How to make screens for vendors to add offers that can be attached to events?

Description
I have a site that offers a way to find art films in one’s geographical area. So I’m using Locations as Theaters and Events as Films. I’m using your #_ATT option (which is awesom BTW) to allow the theater owner creating the events/films to offer an award for users who have a certain experience level (I’m using myCred to gamify my system).

Award: #_ATT{Award}
Experience Level Needed:   #_ATT{Experience Needed}

What I want to do now is to take this to the next level. I need a way to add vendors. So let’s say there’s a pizza restaurant in the mall where the theater is. This vendor, Pizza Man, needs a way….much like the theater owner….to log in and add the Offer, Experience Needed, and Expiration Date.

How easy is it to add this functionality to Events Manager? Is it such a major undertaking that I’m going to have to step outside your framework and use Gravity Forms? Or can I refactor some of the code that drives your front facing CMS to simply allow for these three fields.

Bonus: I’d like those fields to be #_ATT fileds so I can use the same custom sql I wrote to display earned Offers in a user’s profile…

http://wordpress.org/plugins/events-manager/