Still up in the air is how exactly the city will pay for the project. In addition to the $10 million for the land, Emanuel is planning to use $20 million from the sale of an existing city truck yard near Goose Island to a developer and another $5 million from the sale of a River North firehouse that will be rebuilt with a high rise on top of it. He’s also hoping to get at least $23 million from the sale of a handful of other existing police and fire training buildings, according to David Reynolds, commissioner of the city Department of Fleet and Facility Management.