I do appreciate @bludski your suggestions and congrats on your project :) really good job!
My pc: i7-5820K @ 3.3Ghz, 16 GB RAM, one monitor, GTX TITAN X (oh yep It's worth its price).
I'll have in mind your hints and make a mini world to see how things works better. If you remember a tutorial that can helps don't hesitate to tell us.
Finally, I think that I'll share my experience here hoping that can help others I guess!