To begin with a Major Task description, here are reference images of what to expect to build in preparation for the Game Level:
Not to seem like a complete “tool,” however i have a rough outline of the estate’s mansion model to pre-viz and am using it as a ‘starting-point’ to brain-storm on modifying the structure, and what to expect to be building in the Level Project 
The rough outline to be modified by the team’s creative input and workflow:
