What kind do you like? pink or blue fluffy ones? coz if your getting 20kg of sassy ANYWHERE you will be involved in a setup and be arrested, sheduled substance the dea is all over it like flys on shit.
Even if you were being serious about have 20kg (per day?) you cant do it all at once yes you'll implode, do small batches under reduced atmosphere, doing it at 238 @ 1atm is hard as that higher a temp is too hard to stabilise, and you'll burn the oil before it starts to distill, end up with fuck all of nothing.
20kg, dont be an idiot, if anyone in any country offers you 20kg its the drug squad/agency whatever, ie your fucked. And distillation of ~800g takes about 6ish hours to get decent yeild and purity.
If you had maybe 20 vac stills working in unicen, yeh maybe but otherwise your dreamin.
Rhodium is right, if you have to ask a question like that your in the wrong place.