Where did he/she receive her training? How many wedding cakes has he/she done? Will this be his/her first? You want him/her to experiment on your wedding? This is not a birthday cake! Does he/she know about the foundation inside the cake so it doesn’t topple over? The icing designs on the cake must be precise. Is he/she going to set your cake on a piece of foil covered plywood or are you going to purchase a silver base? A wedding cake must be centered on each tier, and level on each tier (you don’t want your cake leaning).
This is one of the most important days of your life. That cake will be the most photographed at your wedding next to your dress. Hire a professional cake designer; it will be worth every penny. If you are not happy with the cake your cousin makes you there will always be hard feelings. You don’t want that!