By "similar service", do you mean direct competition? If so, I'd stick with what you're doing (esp if it's paying some bills) - it's obviously got traction. And you can't beat being your own boss.
This reminds me of luckychic.com guy that PG talked to at TehcCrunch office hours. http://techcrunch.com/2011/05/25/absolute-must-watch-office-...