Fake cake?

As soon as we announced our engagement our very close friends offered to organise our wedding cake as a gift.

Then we decided to wed interstate. After speaking to airlines and other brides and cake makers, I was assured that cakes travel very well by air all the time. Now our cake maker isn't too confident and has suggested that she can make up a polystyrene cake decorated however we like and for us to then buy a kitchen cake up north. The thought crossed my mind in the early days but since then I've been very happy with the idea of a real cake.

It makes sense in a number of ways, not worrying about transporting it (as long as the decorations hold up) and we can have a fresher cake on the day - any flavour we like. But what to do with this fake cake after the day? Bring it back? Store it in the cupboard? Use it as a table centrepiece? A door stopper? For the cutting of the cake the bottom layer will be pre-cut in a certain spot (and marked cleverly), then iced so hopefully it won't make a squeaky sound when the knife goes through. I think it's a clever idea, but I just have to get used to it. Of course we can't let the guests know it's a dummy!

Any thoughts?