hi i was wondering how much does a professional studio charge for providing full specification authoring, encoding and customized design like those stunning motion menus on big budget Hollywood films? please take a look at the "Hot Fuzz DVD for Universal Pictures" and other examples then you'll know what kind of menu i'm talking about.
Hard to say since I know nothing about the film your working on. It it were me and my graphics guy on THIS , I'd say $6-10K since it looks like there's camera production work.
But you need to look at how many units you plan to sell and compare that to the kind of disc you want. This is the Pavement in London....they do high end work with clients who have big budgets....but also sell millions of units. :)