Steve, now youve got the miniature railway and palm trees sorted had you considered a campig coach? ▶ Railway Roundabout 1958 'The camping coaches' - YouTube
Lots of 'em about in the west country, old clerestories and so on, even the famous Pullmans at Marazion. I remember being fascinated by the one I saw a Falmouth as a kid.
Just a thought.
TP