Invest in an MSR Miniworks water filter; filters up to 2000 litres, you can filter absolutely scummy water, it filters bacteria, parasites, fungus, and the filter is easy to clean. About $150
It is possible to harness some wind energy using nothing but garbage and hand tools. But you need to know the basics:
Learn about wind power:
http://www.velacreations.com/chispito.html
http://www.otherpower.com/otherpower_wind_tips.html
http://www.thekevdog.com/projects/wind_generator/
And electronics:
http://www.kpsec.freeuk.com/index.htm
I have more links if you want 'em
- MGC