Biodiesel questions

[Tippin Spotted Cow]

Alright guys, I'm just starting to do my research on biodiesel, thinking about switching over on my '93. I've got a couple of questions... bear with my ignorance on this subject. I want to be as educated as possible before attempting to make the leap.

First off, I've found home biodiesel setups all over the internet for usually around $3000 or more. There's one on Biofuel basics website for $750, or $350 if you find your own drum and pump... are the other ones that much better, or is the cheap one missing some major parts I would need to add to the setup? Has anyone used their kit that could tell me how they liked it?

Further, most of these things seem like they're basically just a bunch of pumps, hoses, filters, and tanks... why can't I got to some industrial supply store and make my own system for half the price? Does anyone know where I could find a basic setup plan of what the system needs, so I could design my own?

What's to stop me from buying an in-bed refueling tank, and building a system off of that as opposed to a 55 gallon drum or holding tank?

Once you start running on biodiesel, an you switch back and forth to regular pump diesel if you're on a trip away from home, or can't get to a source of fuel, or something of the like?

What do you do in winter? Can you start mixing the home brew with some winterized pump diesel, or do you switch back entirely to pump diesel, or is there an additive?

If I wanted to add propane or water/methanol injection to my truck, how does that react with the biodiesel? Any issues in running the truck that way? As I recall, methanol is among the chemicals used in making biodiesel, so I'm a little concerned how that would react.

How's the performance? I know I've heard the truck should run and perform better off of the biodiesel, but I'd like to hear from someone with a tuned truck running biodiesel how they like it.

As I understand it, biodiesel can be corrosive to certain materials. Do I need to change out any seals, lines, pumps, or even the whole tank, to run my truck on biodiesel? Everyone says you don't have to modify your motor... but what about everything else the biodiesel touches?

Have I gone over my quota of questions yet? Any help from anyone with any kind of intelligence on this subject would be appreciated. Thanks in advance.