alternative fuel?

[wutangbuzz]

I'm just starting a new job which involves a pay cut so we've had to make a few cut backs. My Mrs suggested I don't ride as much (of course she didn't suggest fucking off her horse!) I'm thinking of getting some spuds and making some moonshine to try or fitting LPG tanks to save cash. Anyone else tried this? Can you fit a gas tank under the seat? Or wound it be better with 2 smaller ones under the fairing infils? Also what percentage alcohol does a foxeye run best on?