There are a lot of folks talking about Digital Twin and wanting to give it a try without committing to a huge project. You can take one of your existing floor plans from AutoCAD and trace it in Revit or Revit LT with standards OOTB elements and connect that to programs like Tandem or Archibus or Planon.

For the specific clicks and picks:
http://mistressofthedorkness.blogspo...model-for.html