You could just make a small wind generator and mount it on your roof. You would definitely be able to power a small snake room, and it probably wouldn't cost much more than it would to make enough of those to create any real power.
Here's a non-turbine generator that can be build for cheap and stacked.
Here are some turbine generators:
YouTube - Homemade 200W Wind Generator
http://www.youtube.com/results?searc...rch_type=&aq=f
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