Having a home business by blog marketing would definitely entail that you have more than one blog. If this is something that you are considering, you will want to make a list of markets that your blogs can cover. You will find that your blogs will do best when you only have one market per blog. For example, if you have a blog about cats, you will not want to include anything on the blog about kitchen appliances.
This is because the readers that read your blog and visit your blog to learn more about cats and what you have to say about them will not be interested in learning anything about kitchen appliances. Once you have overcome the relevancy issue, you will be ok. You can however, have a blog about pets, and then blog about all of the many pets that you want to include.
In order to make a living by blog marketing, you need to know every aspect of it. You need to know what needs to be done to get readers to your blog, how to write about the things that you are promoting and how to get it up in search engine rankings. Doing so will lead to successful blog marketing and making a home business income with it.