When you create blogs targeted at a specific or niche market it is worth considering writing more than one blog so that you can capture a wider range of keywords via the domain names. You can of course cover the keywords within the posts on a single blog and this is still quite a powerful method especially if you place the keywords in the title of the blog post. But imagine the affect if you can capture relatively high enquiry keywords in both the domain name and the blog title then target the less popular keywords in the post titles and text.
I think you will see that this can actually be a powerful way of bringing traffic to your blogs, plus you can link the blogs together pointing to each other giving back links that are relevant. Add to that articles that are written to direct traffic to all of the blogs independently and by default your articles are now potentially connecting your audience with all of your blogs on the subject or market of interest. If everything is well written and keyword rich you can direct a large part of your target audience to all of your blogs across a wide range of enquiries or keyword phrases.
Below is a simple example of this strategy at the early stages of developing a presence in a niche market: -
