How are you so sure that this is the number we'll have to pay if it is extended? The thing with the Sheppard Line is that it gets good ridership in spite of what it is. The fact that its ridership per km matches that of Atlanta's entire network despite only being 5km long is impressive, but it also speaks a lot. Sheppard has low ridership because its unfinished, and for many people using it is a big hassle. If you're going to the Yonge line, you have to take a bus to Sheppard, then get on another bus to Don Mills, then transfer to the subway and ride it for 4 stops where you transfer AGAIN to reach the Yonge Line platform. This makes using transit extremely inconvenient which overall discourages its use, meaning the only people that use it are those who don't have the luxury of using a car. There are a ton of condos popping up around Sheppard Avenue, especially at Bessarion, Victoria Park, and Agincourt, however these are all car oriented condos with large parking lots that encourage owning a car. The Sheppard East LRT doesn't solve any of this. All it does is just make the Sheppard Bus higher capacity. If you extended the Sheppard Line to STC and Sheppard West so that the line actually goes somewhere (where it becomes a proper transit line that connects several dense nodes), the transit ridership would increase dramatically.