Why not create a mall creator... would be sicko epic. in the mall creator it should be a tool to create vendors and a place where you could put the x: y: z: for spawning vendors and gameobjects.
So this is it: if you press the buttom called vendors spawns a window where you can put the coords for where each vendor shall be and after adding one just press a buttom add more and more places for coords pop up in the window. and the same for gameobjects. hope any good programmer can realese this, cause it would be extreme epic.