I found it very difficult to make rooms/worlds in Wings. Wings is a SubD modeller, in that everything starts out as a primitive (usually a box). You then contort that box into your model. So, Wings3d can't really make "hollow" objects like a room (I forget which is concave and which is convex, but wings can't do one of those easily).
Also, I haven't come across a decent texturing method for worlds. Importing the object into Unwrap3D just makes you realise that Wings3D+Unwrap3D is only good for world objects - people, plants, animals, etc...
You need a world building package to be honest....
Floats like a butterfly, stings like when I pee