[turbo6bar]

I've been making and using biodiesel for 18 months. It's a lot of work to make quality biodiesel. I wouldn't go back to burning dino diesel, though.

There are nice commercially available biodiesel processors starting around $6000. It will remove a lot of the experimentation and rube goldbergesque DIY aspect, but you still have to find the oil, collect oil, dry the oil (if necessary), as well as find a disposal route for the glycerine byproduct. I'm not trying to scare you away. Just be prepared that this isn't a fire-and-forget fuel solution. You are trading time for fuel savings, to some extent.

The fact you have a teacher is a big plus. Just make sure he's making quality fuel and not crap fuel. You don't want to learn bad habits.

Good luck,
Jurgen