One Blog or More Blogs

I always come across lots of bloggers, who are really BLOGGERS by professional, where they own many blogs. For example, they have blog on cooking tips, rants on daily parenting, about technology, about ANYTHING in the world. In fact, recently I heard of one blogger who achieved a PR6 for his blog within just 6 months blogging and sold it for $10K.

Can I be one of them today? One Talk or More Talk?