One of the most difficult parts of starting a business is ramping up the sales & marketing in the first few months. The reality is, that marketing is necessary to grow & increase visibility. Visibility is critical as people only buy from businesses they know about.
Once marketing starts working, you have money for more marketing. So the challenge is always at the beginning, when a marketing budget is hard to come by.
This video highlights the top 20 (and then a few more) ways to having a low cost marketing budget.