How much you can afford to put forth in your marketing budget is something that you should always be carefully examining. Although you may find that you are able to have almost unlimited use of your funds, there are also times when this is probably not the case. It is important that you realize that you need to be prepared for either event.
The best thing to do is to plug all of your marketing information into an excel program that can spit out the answers that you need to your particular marketing concerns. With that in mind, get to work making it happen