If this object is intended for use in vue only, and if the main problem is with the pillars on the balcony, you might want to consider using the pillars as eco instances rather than one large objects.

1. remove the pillars from the big object
2. make one pillar object
3. make an object (or material group) that defines the area where the pillars should be (3 rectangular shapes) (I'll call it 'shape')
4. import the main object and shape object to vue.
5. Make the shape's material an eco material, use your pillar object as 'instance' and populate using 'force regular alignment of instances'. adjust density to get the spacing right.  If small additional adjustments are needed for precision placement, convert instances to objects, adjust and restore to eco.

When finished you can save as vob
It saves a lot of resources to have items as eco instances rather than objects.

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
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