A tourist attraction in the making. Take the old Kingston Flyer. Base her in Greymouth. It then meets the Tranz-alpine from CHCH. Offer trips to Hoki and Westport on alternate days. Encourage oversea train boffins to book accommodation so they get the opportunity to ride steam to other destinations on the coast, bringing tourist spending to the crafty shops in Hoki and the history towns like Reefton and Westport. Plenty of coal to feed the firebox. Plenty of engineering firms in Greymouth to do the maintenance/repairs/boiler certs. Costly to start up, but a consortium of businesses could bank roll it until it becomes a bit more self sufficient. Wouldn't take long for it to start making profits (Once the world opens up again) when you consider the Tran-alpine is already world renowned for its spectacular scenery and PPL come to NZ specifically to travel on it. I might be making it sound to simplistic, but it seems like a no brainer too me.