After a few trails on where to put our layout, I settled in my working corner next to my laser cutter and my computer. Also close to my 3D printer. So everything I need is right at hand.
Plan to do a CANOPY above it with some sort of dust cover to cover everything when not in use.
Size of table is 2000 x 1200.
Nice and high
Made it this size because I found a nice layout that can run multiple trains at the same time.
Table is attached to the wall on the far side.
Frame from 44 x 44 pine
12mm Chipboard on top of that.
Then a 50mm thick High Density ISOBOARD polystyrene layer on top of that.
Now to find LOTS of time to get going.