Robert
I do not necessarily agree with that concept for a couple of reasons:
First the cost of converting your truck vs building an Appleseed Processor favors the Appleseed (you can make one for about $250 if you are a good scrounger)
Second production cost favor WVO (WVO very small, filters etc, and BD about $.75 to $1.00 per gal)
Third converting your truck may limit your customer base if you want to sell it in the future.
I am not advocating for one or the other simply pointing out some factors that may affect your decision. Do good thorough research before you choose onr or the other.