Yeah, the Cariboo Connector is projected to come in around $2 billion, but that twinning won't be completed for at least another 30 - 40 years due to relatively lower traffic counts.
And even then it will not be freeway standard -there will be no new interchanges - it will just be a "junior" 4-lane expressway standard highway.
BTW, here's a pic of the new Simon Fraser Bridge twin while still under construction:
Source: Flickr - diffuse