You can spend as much as you want with digital marketing and traditional marketing. That being said, one of the things that makes digital marketing unique when compared to traditional marketing is that you can cast your message directly in front of your ideal audience. With traditional marketing, you are generally casting a lot wider net. Digital marketing helps you present the right message at the right time to the right audience. Further, you measure the results of your digital marketing efforts quite easily. Measuring the results of traditional marketing is much more difficult. A digital marketing agency should provide you with insights and analytics into your marketing efforts, so you always know how much it is costly and what the ROI of such costs are.