They’re taking over the operating licenses when they expire. This doesn’t cost much, if anything. The rolling stock is a different matter but they haven’t committed to buying this. The question at the moment isn’t “where does the money comes from” but “what about the rolling stock. “It's a done deal. In 10 years he'll be gone, and the cycle continues.
I expect folk will want to know where this money for the choo-choos is coming from.