I really like the concept of what I suppose could be called a purely tinplate layout, an idea that I have been mulling over the past year ever since completing my small Hornby version of the same concept.
I have been taking trains out of my purchasing list for several months now building up a stock of tinplate structures ( not an easy task) Your layout is an inspiration as well... to keep going in this direction.
I had the Lumar conveyor\ loader ( looks somewhat like a coaling tower ) and so the latest acquisition was the hard to find Lumar construction office to go alongside of it.
A dump truck is next and those are pricey in good condition so I am saving my pennies.
What a great example you have !
Another acquisition has been the Marx airport for which I had gotten a tin Constellation...I am seriously considering dismantling what I have just to have the opportunity to follow your example but I am still dithering about it.
Your stuff is always an inspiration to me and my ambitions..you just gave me another push.