My idea is to have a layout in the garage running down one wall. This will be about 25 feet or so and will be on top of an old set of kitchen units and some shelving, so I have 18 inches to two feet width to work with.
I plan to make some basic scenery on a low relief basis which will also allow room for some low relief Playmobil buildings.
To provide some variation, there will be a run-around included so that the train will run on a straight line in one direction but will go round the run-around on the way back. There will be an island platform in the run-around and, hoepfully, a station stop set up.
There will be suitable buildings and platforms at either end, too.