Great stuff. As the inventor of something called 'JigStones' back in '92 (you might have heard of it - the 'G' scale model building system), I was involved with this kind of thing commercially for some years. However my activities in garden railroad modelling have become diluted now with the passage of time, and having moved house recently I've no plans to tackle anything new.
To keep my interests alive I occasionally knock out the odd painting (the one shown below is of scaled down ride on railroad in Cornwall at a place called Dobwalls)