3ds Max Animation :: How To Minimize Memory Usage And Keep Model Size

I have recently downloaded 3ds max for Architectural fly through animations and to create construction sequence animations. I will not be modelling any designs in Max as I already use either sketch up or revit and plan on importing those models in to max. I have looked at a few tutorials here about importing into 3ds max which have been very useful but I would like more info/tips on how to keep model sizes down etc when importing e.g material usage, avoiding importing unnecessary elements especially from revit and how to set up models for quick rendering times when creating building animations. I know your computer specs are a big factor but sadly I cannot afford a high spec machine at the moment and I have to improvise.