Based on many such posts (but only a few models posted that weren’t behind NDAs), with titles like: ‘LayOut is moving very slowly’, ‘SketchUp file won’t open’, etc…
try making some basic changes at the workflow:
- learn the difference between 1024 KB and 100 MB;
- keep track of the number of entities (edges, faces) of a component;
- don’t download components from 3D Warehouse directly into the file you are working on;
- do not work directly in a SketchUp file located online;
- look for lowpoly models, especially if you intend to send the file to LayOut;
- use textures under 1024 pixels;
- it’s best to create the necessary components yourself, as light as possible;
- use Purge command;
- …
After a visit to the 3D Warehouse
Make no sense to expect to be able to import everything you like from 3D Warehouse into your model and have the program run as if you only had a cube.