The issue is this: building the ACU teleporter basically requires a bunch of extra generators and storage to avoid crashing your economy, but once it's built nothing else needs energy on that scale so it largely goes to waste unless you suddenly decide you need to spam shields or something. Once it's built, using the teleporter is so comparatively cheap it might as well be free. So if someone could make this mod, that would be awesome:
-- Teleporter build cost reduced from 1.5M to 30K (that's right, it's only 2% as expensive as before!)
-- Teleporter energy use increased from 100K to 500K (5x as expensive as before)
So equipping a teleporter still requires that big power station, but you have to keep it around if you want to keep teleporting.