The most available and attainable leads are the ones that are actively seeking what you offer. These are low-hanging fruit. All you have to do is show up.
SEO is one of the best investments you can make online. The reason is simple: it drives high-quality traffic with intent to buy.
The longevity of SEO allows for costs to be extended over months, or even years. While it might take time to reach the top of the search engines, the long term results will pay dividends.