I know this isn't exactly what you're looking for but:
-Activate snap to grid, to make perfectly aligning objects easier. Making the grid half or the same size of the object is what I usually recommend
-Best practice is always to have objects whose height and width are power of 2 (2,4,8,16,32 etc.)
-You can duplicate one or multiple objects by clicking and dragging with CTRL held down.
Keep these in mind and you can quickly CTRL drag down a couple of times and duplicate the above results rather quickly