Honestly you have to start spending money on your business. Would you spend 48k to make 840k? I mean you can start small and build up but if you really want to accelerate your business and growth you really need to start spending some money. The beauty is, you can start with zero dollars and build up a bankroll and use that money to test different advertising sources. Weed out the bad ones and scale the good ones. That is how I've done it and most of my partners. The way I got started was doing simple review sites and article marketing about 4 years back. Built a simple site, did some articles made some affiliate sales. Made enough to start testing advertising sources. After that got into a traffic co-op with a few other investors and my profits just started to really take off.
Ok ok well i have to pay for a domain thats all though, my hosting is free and its 100% uptime. Well it has been since i received it, so thast $6.99 a year.
It varies from month to month, but currently, I'm investing $0 and LOTS of time. I'm more concerned about content - once I feel like I've got a respectable amount of quality content, I'll begin advertising aggressively.