You need to build tunnels at least at the rate that they get discovered. Also if there's excessive traffic at one tunnel, it's more likely that it'll get found. A distributed network of tunnels is much better for business.
Sure, I am probably also underestimating how many drugs get sent past the border. But, the point still stands you can send a lot of stuff down a tunnel where loading and unloading quickly become the largest issue.
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You need to build tunnels at least at the rate that they get discovered. Also if there's excessive traffic at one tunnel, it's more likely that it'll get found. A distributed network of tunnels is much better for business.
Sure, I am probably also underestimating how many drugs get sent past the border. But, the point still stands you can send a lot of stuff down a tunnel where loading and unloading quickly become the largest issue.