This suggestion is somewhat familiar with the new RV update, except with weed. With this you will be able to grow your own weedfields anywhere on the map (that the devs deem fair of course) Like the recent update you would purchase an RV and convert it into a weed processor.  You would then go to a store and purchase the seeds to grow the weed. Once you have purchased the seeds, you would find a remote location on the map to plant an X amount of seeds and wait an X amount of