What's the alternative? Americans spending more money than they should by letting the gubmint do the work? You are forgetting that Cintra is ponying-up something on the order of $7 billion up front. Money doesn't grow on trees, not even in Texas.
Banks. Duh! Those commercial sources. But of course, Cintra doesn't fit Reagan's criteria, do they? I wonder if there are banks in Spain? Probably not.