The best thing that you can do in order to achieve the pre-requisite resources for the building production is to build your units.

By building units, you will be able to raid other accounts for resources such as alcohol and weapons. You can even loot for drug which you can put on the heist and earn some futures in return.

You don't necessarily destroy other accounts since some accounts have inactive owners and they just constantly produce resources, we call them feeders or farms. Just build spy units to check on them.

Just be careful on interacting with other players because they might see you as a threat and will attack you in return.

I have been playing drugwars for over a month and get the used of it by raiding because I can't afford to build production buildings just on my own.

Cheers! ^^,