Ok so I'm pretty sure I can make the cakes themselves, but how to stack them? I need to have 4 cakes together and I was thinking just putting a piece of cardboard under the one pillow then adding the next, yes the cardboard would be visible but I could cover it with fondant...and if that's not enough pressure, this is due on Sat.

Any advice?

well, obviously dowel or use small SPS plates and legs, but yeah, that's the way I'd do it.