Not only that, but the teams don't have to pay rent. Would the building and the teams be sold as a package deal? Because everything changes once you need to start paying rent to play in a building. Owning your facility outright, especially with all the tax breaks and engery breaks the Garden gets, makes divorcing the teams from the arena a bad business move.
But to think, if you move the teams out of the Garden, the tax break and engery subsidies go away, screwing the title holder of the building.
If I were king, I'd make sure the building is in the deal...