I learned two things when I was in your position.
-What the heck should I do with all the left over glycerine after a couple hundred gallon batch. They claim you can dump it outside, but I doubt that is legal, here it would most likely be considered a waste product of some kind and therefore need to go to a landfill until you could prove to the state that it is of beneficial use for something.
-Where can I get the raw ingredients in large enough bulk so my bio is not the same price as reg. dino diesel and where can I store 1,000 lbs. of lye comfortably/legally.
I opted to save my money and wait to run straight vegi for simpicity sake.
Oh by the way, I order a bunch of lye straight off the net, and they showed up at my door.