While building an expanded Daily Bugle set, I have designed motorization options for motorizing the minifigure attached to the communications tower. The designs below, created with Bricklink Stud.io (free software from bricklink.com) all rotate the attached minifigure around the communications tower, with unaltered Lego parts. Please note, a White Lego Rubber Band (not shown due to Stud.io limitation) is required to connect the grey pulley to the white tower to make it rotate.
Studio digital design file for the extra floor, based upon the set 76175 Attack on the Spider Lair, to which you can use either the PF or PU design for motorization. (Right photo above)
Requires either Powered Up or Power Functions motor and battery as above.