All I can say is 'Nurse the screens' what a fantasic sight and just so good, I would suggest one thing folks, you need to have two locos on site, so if one fails you have a second as a back up, you don't want to be open to the public for the one and only loco to have failed.
But if you don't mind where the second one comes from I did hear that the Sri Lankan Railways had a couple of 5ft 6in gauge deisel locos for sale.