I’d bet that a number of you have seen Primer, but for those that haven’t, it’s a great example of a low-budget sci-fi feature that was shot for very little ($7000 and they shot FILM) over a short period of time with a tiny crew (most crew doubled as actors), but made a terrific, suspenseful mindbender of a film. Great inspiration, I’d recommend renting it.
If you want to know more, check out any of the following:
http://en.wikipedia.org/wiki/Primer_(film) — Good info on production, but contains some early plot spoilers.
I’m not a huge fan of the trailer, but it’s at: