How?
Marijuana can be grown in virtually every state, either indoors or outdoors. Those who use pot will prefer to buy it through home grown sources rather than subsidize the government by buying government packaged joints.
Thus they are setting up the need for an enforcement agency to go after the backyarder's. Is this cost deducted from the 2.4 Billion?
why would the average person grow their own. No need to much time to get from seed to weed. 90% or more of current MJ smokers would buy it directly from whoever is selling it. besides the people who are smoking now don’t grow it why would they when it becomes legal