Adobe Dimension work flow with large files/ multiple objects

I'm new to Dimension and trying to figure out a good work flow when using multiple objects in one file. I'm essentially building a box packaging mockup, which then is placed 3x5 (25 packs) in a tray, and then stacked 5x5 (25 trays, 625 packs) on a crate. As I build my file, it freezes and is too big. How should I change my flow of work to avoid super heavy files?