Ras Al Gual's Mantion

Okey,Im Doing Ras Al Guals Mantion,Now Im Using The Batman Begins Video Game To Create It.It In THat Game,But Im In Need Of Help,I Am Not Even Done With The First Building Because I Can't Decide What To Put,I Don't Want It To Be Exactly The Same,But Should The First Model Be Empty,And Then You Guys Will Add Stuff Or Not.I Would Make It Empty And Then Create Some Objects And Add,Then After You Guys Will Add The Final Details And Textures.