@aleks: Instead of renting studio space, you could use textured solid-color backgrounds from built structures, use the colors as additional metaphor for the sin. Say something like:
I'd try and hit up the drama/theatre students, or even put up a couple of signs saying you are looking for someone and they can use any photos as portfolio material if they are looking at modeling as a career. It would be a benefit for both sides. You get some material and they potentially get a glossy 5x7 or 8x10 to add to their portfolio material.