Other Sources
The 'other sources' referred to for this project is money obtained from developers under a 'section 37' agreement.
When a developer asks for significantly more density that the OP permits they are required to enter an agreement to provide 'Community Benefits' under Section 37 of the Planning Act.
In this case one of the local developments, I don't remember which off hand; I'm thinking it might have been the Hazelton or 100 Yorkville, but I'm not sure, provided the first 600K or so for this project.
This was supposed to be 100% of the project budget.
However, upon detailed engineering and design it became apparent that if they meddled with the structure the way the intitial design suggested, the building might be de-stabilized; besides, never waste an opportunity to fix old infrastructure while doing cosmetic work nearby!
So now their calling for demolition all the way down to the mezzanine level.
The cost still does seem high to me, but I'm betting its covering alot of design and engineering costs, including at least 3 sets of drawings that I know of.
However, I'm all for making the subway a bit more upscale looking, its important that it not appear to be a service merely for students, seniors and the poor.
This is also a tourist area, so I figure its money well spent.