I am so new to the 0-gauge that I have only purchased a big box of track. (More stuff is ordered.) Due to space considerations everything needs to be portable and stack-able. Both cars will be parked in the garage every night.
The first layout I will build is a 4x8 for my son. It has to split, stack, and slide under his bed when not in use. I am basing construction on the Lionel modular specifications. The second requirement is that it joins with a modular segments so that it can be part of a larger layout. The modular main line will act as a siding for the smaller layout. Here is a screen shot of my plan:
An earlier version fit on 4x10 and needed three segments to store it. The problem with it is that it would not fit in his bedroom without using the bed as a tunnel or removing furniture.