Not a train set as such, but I loved the Babbacombe cliff railway, and when I was about 9 Dad made me one! Same angle, carriages pulled on wires up/down rails (think he used 12v), magic! Used to play with it on the stairs and the beach was the bottom (sand on a towel...nothing like authenticity!) and the ticket-office at the top (box with a little man in...).
That's just genius Howard. Do you have any photos of it?