Model Disappeared while finishing a project

I was just finishing to do a project due for Thursday when suddenly my entire project disappeared. I cannot zoom in, or move my mouse anymore but CTRL-A shows I still have my 150 entities.
I have tried to copy things over to a new file and the problem remains.

Here is the file I have uploaded on both Wetransfer and Dropbox : Dropbox
Unique Download Link | WeTransfer

  • Group all geometry in the model when you drawing;
  • Assign Tags to groups and components, not to raw geometry (Line, Arc, Circle, Face, etc…);
  • Use Tags to control visibility, not Hide;
  • Don’t import everything you find in 3D Warehouse, look for lightweight models;
  • Don’t import them directly into the model you are working in, but open them separately and check them.

Your model is way too heavy (~200MB) for that house.
I tested two recovery methods, one where I deleted all raw geometry, and the other where I grouped it, but many objects were moved to the origin.

Which one do you find more useful?