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One day I'll try converting cassava to ethanol. What do you guys think? The ethanol can be use as complete fuel for single cylinder engines like irrigation pump. If you dry it to 99 percent you can mix it with petrol and use in car engine without modification.
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With the excessive supply of cassava, there is usually glut in different parts of the country. So you can get the cassava at a reasonable price. Another alternative is that you can cultivate your own cassava.

A very nice concept. But there will be lots of challenges like how to build the distilation machine, how to ferment etc. Where can one get brewer's yeast?

@ Op have u tried this? Where can we get the enzymes that will convert starch to simple sugars.

I have not tried this yet. But it is still in my to-do list.

Cassava is now very costly. Fuel too. Is it still profitable?