Yeah, my strategy has been not to upgrade training facility, upgrade hydrophonic farm, and storage so that you have 11k safe of all ( drugs, wepons and alcohol)
Now it is getting a bit difficult feor me as I require more resources than I have safe, so I get robbed. Will probabbly upgrade training f after all.

Or else I will have to uprade storage, but next upgrade brings safe down to 7.5k, maybe it goes up in next lv. do not have cocaina, but will go for a meth lab if I can get up to the resources I need :-)