We went with two wedding cakes to save money. We bought a small traditional wedding cake from Roth's IGA. The three layer cake was 10in on the bottom, 8in middle, 6in top. Marble cake with fondant icing. It cost $174.00.
The flat sheet cake was a $15 cake from Costco.
Due to miscommunication the sheet cake was served first and fed the 80 guests. The wedding cake was only touched by the initial cutting by my bride and me. It was later split among the family.