I tried to model a few pieces again to see the poly count and how it looks. It looks the same and have less than 1/3 of the current polycount. I think i could have done this model with 40-50 k and have the same look.

I think you are both right about what you say. "In my case" low poly won't make much difference. But yea, i need to learn how to get the minimum weight with having the same look. Most of the pieces are not organic and low poly would do in that case i think. I don't have a client but yea when i consider using that model for something in the future i will think its heavy.
Still didnt have time to check the occ and approx... Will work on that.