I'm guessing you already unpacked the main computer, desk and other essentials?
I packed them all up from the dorm, then when I tried unpacking them all in the rented room, the option isn't there. I tried changing the room to all the different types of room options, but it didn't work. The laptop can appear sometimes, but not the desktop.
EDIT: I figured it out. It's cause I didn't have a desk. In hindsight it should've been obvious. Thanks anyways.