You have all the time to rearrange or polish your flower arrangement. The flower design should look beautiful and artistic enough before you place your filler, when the filler is already placed, it would be harder to move your things around the area or place. Bear in mind that The filler are very fragile.
Budget Issues: Hiring professionals is often considered expensive but there is also a solution for this issue. If your budget is low then experts can give you the best floral decoration without spending too much in unnecessary things. But, in case of amateur chances are high that your most of the budget get wasted in the purchase of needless items and your decoration gets only satisfactory which you don not want after spending thousands of dollars.