[mooders]

It's a tough decision. You should not ignore where your passions lie, however as has been suggested elsewhere if you want this to be your core revenue stream you must understand the relevant metrics.

I've written about this on my blog, where I have discussed this and similar topics in greater depth: http://www.fourthirds.com/which-idea-to-bet-on/.

You might also be interested in reading Seth Godin's short book The Dip. This discusses ways in which you can decide when enough is enough.

I'm always happy to be a sounding board, in as confidential a manner as you wish, for ideas and offer advice on what to do next. Hit me up at the blog if you want to take the convo further.

Good luck!