If you know a narrow niche well you can still do well with not much time. I've actually thought of selling a little network of sites I have because now is the time to buy a house.
I'll kick myself if I can't buy a house in the next year when prices will never be this low. So, if I sell those and use the money on a house, I'd start up 4 sites again just like them.
In about 2 months I'd be making money off them, more than now in around 4 months because I know so much more about doing everything from scratch.
However if I had to make just a "general" teen or babe site, I would not even try.
