I've been using Blender since '99, so I may be able to help.
You have EEVEE configured to render on the GPU, don't you?
If so, start a new file and try to see how many faces your computer can render in one second. Then we'll look at your scene and try to see if we can hide/reveal corridor sections so that you never have too many faces visible.
You have EEVEE configured to render on the GPU, don't you?
If so, start a new file and try to see how many faces your computer can render in one second. Then we'll look at your scene and try to see if we can hide/reveal corridor sections so that you never have too many faces visible.