The amount of energy needed to create the wormhole is small, thanks to the volitile nature of dark matter.
It is the same reason why the Scorpions are so destructive. The arbiter is loaded to the gills with the shit and could hypothetically drop SSDs if it were parked in the bridge/engine room.
The wormhole is creates is not artifically sustained. It has a natural cycle. The Abirter opens an entrance and an exit to the conduit, but the wormhole does the rest itself, including close on both ends so as not to be followed, as it cannot be sustained indeifnitely due to it's artifical creation.
OS: In a world of bon-bons, you are a twinkie.
Ahnk: God damn you, I am Count Chocula and you know it.
I'm not spending my anniversary night thumping my head against the wall. - Damalis, on Moderating TRF
Then tell him you want it harder, damnit! - Ahnk, on Damalis