Direct a Director (me) with your Expert Knowledge (you)

Hey,

So I know this is a "Tech" forum, and your all crazy editors + V/FX guys and gals that stay up all night working on a single frame of video... wishing that the director had just come and sought out your advice BEFORE he decided to add in that whole David Fincher camera floating through the floor + through a keyhole in a door + into the chamber of a gun ... and finally onto the actors eyeball (which obviously shows the reflection of his childhood self)

So here I am ...

I'm writing + directing + producing a new short film on 35mm in October. My dilema is that I have no money left for set design + construction ... however I do have a kickass studio for free and greenscreens. But its so difficult for me to visually plan FX shots

What I'm thinking about doing is using greenscreens to create psychological palates for my characters (see told you I was a director) Umm think Natural Born Killers ... there's always images of horses and crowds fighting on greenscreens outside of their hotel room window etc.

I have 5 bedrooms in which i would like to include this concept. + I have a candy store where I would probably have to fit the same visual concept in to make the film a whole.

What do you think ? -- Is it a ridiculous idea ? Do you have a better idea / usage ? How would you go about approaching this ? Doesn't it look retarded when you have 80% of a film that is shot normally and then a couple scenes where greenscreens are playing Perlinger Archive Footage ? -- Just remember I have no money and a studio with just a greenscreen + props + actors.

If you read all that ... you're the shit

cheers
Dave in Toronto