I see that there could be 2 options here:

• First one would be to use STEEM or FUTURE Tokens to purchase the upgrade. This is possibly the fastest way you can get past that upgrade step. But, as we can see the cost is very high there and the ROI is not much that you would be getting daily from that much drug production.
• Second option would be to go for some battles. I do that almost 5-6 times a day. If you find out right target and have a big unit sent to Battle, there is a possibility you can steel good amount of alcohol, weapons and drugs.