Biodiesel production
I started to make biodiesel because of the outrageous price of fuel.
It has now become a great hobby; not often that you have a hobby that is fun and saves you lots of money.
Don't waste your time with ready-made processors.
Go to www. biodieselcommunity.org. or .com, can't remember. Super site with lot's of great support from homebrewers all over the world.
All you need is 4 55gallon oil drums
A source for good quality methanol
A source for either Sodium Hydroxide (lye, in bulk), or Potassium Hydroxide, which is my preferred ingredient
A hardware store for misc. plumbing parts.
A source for good quality restaurant oil
A well ventilated space to make the fuel.
It will take approx. one week of tinkering to get everything put together and ready for use. Depending on how frugal you are, you can put everything together (equipment) for as low as $300 to as much as $1,200 depending on the bells and whistles.
As with anything worth-while, making biodiesel is a learning experience.
Good luck