Looking for help on a workflow to build an interior VR model

Hi lubenko,
I have searched but still looking for some more refine details on proper file export and import and mostly some help on cleaning up meshes. I started with a 2 million poly count export in blender but it was a bit of a nightmare.

Not sure if modo, zbrush or any others are better suited for this type of work. Just need some help simplifying and reimporting. I was hoping someone knew of some online training or tutorials.
Thx