The best option favoring a budget wedding would be the use of paper flowers instead of the real ones. If you dont have the patience and time to make them you can always buy them and they are in fact cheaper than the grocer store flowers. An added advantage of the artificial flowers is that you can arrange it months in advance. By spraying some scent around you can give them the natural touch. You can always cherish your wedding by keeping your bouquet forever. Another aspect would be the use of candles (Floating candles or elegant candle stands) as centerpieces.