Great topic Arnold. Here goes:
I would build a separate building 75βx125β to house the layout, and a wood shop walled off from the layout 25βx30β.
A work area near the layout to work on structures and scenery. A lounge area near the layout with seating and a refrigerator.
Rest room for after the libations are consumed π.
The layout would not be against any wall. You could walk up to it from all sides.
It would incorporate every track feature that I canβt have now due to space concerns. Not that my layout is small now, (21βx32β) but I could really build it the way I always wanted to.
I would represent the main lines East and West with return loops (very large), so that I could have continuous runs if I desired. I now have point to loop so I have to pay attention!
At least 8β to 10β ceiling (currently at 6.5β).
I even went so far as to design a track plan should this day ever come. It's attached here:
Andy