A list of your income and expenses, no matter how complete, is not a spending plan, but is the information you need to create a spending plan. And, a paycheck_by_paycheck spending plan will help ensure the success of, or at least help prevent the failure of your budget.
A wedding can be a very expensive. For this reason, it's important that you make a budget before you start planning your wedding. If you know how much you have to spend and should be spending on each part of your wedding, you shouldn't have any trouble pulling off a wedding on a budget whatsoever.