 Sometimes they are put together in pieces and then reassembled in other locations under the jungle canopy, in camps outfitted with sleeping quarters for workers.The narco-submarines can cost about $2 million USD and take upward of a year to build.Despite the costs, some of the craft are intended for one-time use, being abandoned at sea after a successful delivery, given that their cargoes carry a street value of up to $400 million.