Directions Unit- More development of 4 minute short film idea.

I have spent some time recently developing my idea about my 4 minute short film which has already been scripted ( I only have to direct.)
Since the theme I chose was "freedom" my original idea was to base the story on a prisoner in jail who meets with another character who provides them with some kind of object which will allow them to escape from the prison (such as a file or a crowbar of some kind.) The only problem with this would be the inconvenience of having to create a set that would resemble a prison cell, and also a set which could represent the outside of a prison.
Baring this in mind, I have been developing an alternative idea, which although revolves around the same idea of a prisoner not being able to leave an area and another character giving them an item to help them escape. However, instead of the character being in prison, the setting could be some kind of post-modern "Big Brother" type scenario, where the "Prisoner" is kept hostage and monitored in an everyday house, similar to the George Orwell story "1984".
Although with the second story the setting would not be in a prison, the theme of "freedom" would still be present.
I will continue to generate more ideas for stories, and will probably decide on which one to use for my project over the Christmas holidays.