I offer this merely as information, not as an endorsement. I read the other day about a growing trend of couples renting their wedding cake. That’s right: renting–as in, paying for it, using it, and then returning it.
The reason for this unusual trend is, of course, to save money. With the cost of cakes soaring, this is one way that some families have found of cutting down on their wedding expenses. It seems there are some cake-providers and / or caterers who provide a cake made of foam, covered with real fondant. There’s a space inside the cake that contains a small portion of real cake to be used for the traditional ceremony. Once the couple feeds each other with these real cake slices, the display cake is then taken into the kitchen, while the guests are served regular sheet cake from a local store. The foam cake is then returned, and re-used (presumably with a new fondant covering).
It can see a couple of good points about this practice. There is no more concern about the cake toppling, and you don’t have to worry about cakes sticking their fingers in it. Still, old-fashioned though it may be, I still would want my guests eating from the same cake as the couple themselves. To me it just seems–well, traditional. Nevertheless, if you are less traditional than I, ask your local caterers and cake designers if they offer this service.