Unreal engine actual performance in VR

I’m tring to create a simulator in VR.
My source model contains very large number of static objects and a limited number of interactive objects. The source model is in the FBX format, 4-8 Gb overall size.
Source model is a technology model for assembly of the large marine ship with all elements including the hidden one and fastening elements.

My target is

  1. To present walk throw inside the ship using VR. Ideally 1-5 users should be able to connect to the same model and be able to interact with each other.
  2. To be able to change model in VR quickly (1-4 hr) after source model is changes (the changed model is provided by constructor engineer).

What kind of client HW should I use for that purpose? (latest Core i7 with 64 Gb memory and GTX 1080ti looks reasonable)
Is it possible to preprocess source model (in FBX format) automatically to reduce number of surfaces or remove hidden one?