This previous post about the days of the week for casting spells can give you a good idea of when your very own hoodoo style magical spell might be performed for you by a professional.
I usually use this system myself when casting one-day spells for clients, because the added power of the weekday can help to compensate for the lesser level of power to be found in a one-day spell cast compared to a 3-day or 7-day or 9-day.
The strongest hoodoo spells -- that is, the kind that you need when you want to acquire large amounts of money, get hired for a competitive position, win the love of a difficult person, and so on -- are usually the ones which are cast over the course of several days. The repetition of the magic is necessary in order to create the larger influences that are needed to bring big changes like these. Many clients don't like to do these kinds of spells, as their lengthier casting requires a higher price, but they are failing to recognize that this extra work is needed if they're to get the large scale results most people dream about from hoodoo style magic.