How is buying land a consession and building on it a consession? Any normal private company can by land and build on it. Are you sure you're not considering it a consession because you're used to "public" transporation (in which case it would be a consession) and not just the normal things any private company can do (in which case it's not a consession)

Even if they are consessions I think they are a positive. They provide a positive feedback loop for the train companies. Better trains = more customers for their other interests and visa versa. If the trains start to suck people don't want to be on that line and choose a different line for their businesses, houses

Compared to public transporation where it's just politians who decide budgets and with few exceptions (Netherlands for example) they almost never decide well.