millercarbons
You shouldn't need to ask.
'room of appropriate size'
Kenjitposits 'the other side of the wall will be infinitely big'.
Therefore the wall will be infinitely big.
Therefore the room on our side of the wall will also be infinitely big.
Even if the room did not extend far in front of the wall, the infinite extent of the wall would make the room volume infinitely large. This would conveniently end standing modes.
Get building mate. I'll come over in a few millennia to check the start.