Budget - Production Manager.

In my group i was chosen to be production manager.
As production manager the role primarily involves having to negotiate things such as cast, budget and location and being the link between the producer, director and also the clientel. I primarily responsible for everything that takes place on the shoot, which includes, locations then booking of the chosen locations, cast, crew and organising the transport, equipment and catering.
The suggested locations for our video have been a pub (coach makers arms), a studio for a performance element and romantic scenes by a river. Our video is all about a broken relationship and we are showing this by having the lead role as a guy who has spilt from his girlfriend. We cant give names for our cast as we havnt yet finalised who we are having for each role.
I now need to discuss the budget with the director and producer after the meeting we had and discuss the first shoot day. We are currently under budget therefore nothing should be too much of a problem.