Considering the number of people growing grass...illegally...and not worried about it...I don't think I'd worry much about growing tobacco. If you had 50 acres and 3 x illegals working for you...you could do a fair bumper crop...and then find some characters in major cities to market it to. I can just see some dude pulling his car up to a street corner and some dude in a trenchcoat comes over...stating $8 for a bag...and a tobacco transfer takes place.
Congress has tried to keep tight control over booze and cigs...because if everyone figured out this tax game...and started to manufacture or grow their own stuff..the tax revenues would halt immedately. And its the same way with ethonoyl...eventually we will figure out that a still in your shed...with 80 acres of sugarcane is enough to produce all the fuel you need for two cars a year (50/50 blend of course). This is not the republic that we all know and love...it is a tax state.