Professional blogs are started every day, and many might want to pay someone to set it up for them.
Some people see their blog as a serious tool in a serious business and don’t want to spend the time it takes to learn WordPress inside-out They would just rather focus on what they do good, and let you set up their blog, installing the plugins, setting up the pages, and everything else that goes along with setting up a blog.
The person they pay could be you. And might as well should be.
You can make it a specialty, or just do it on the side. Either way though you should try to produce the highest quality in a shorter period of time. Your growth will soar and so will your revenue.
Some people want to create websites for others and sell them, you could help set up blogs for others.
You can combine this with content creation as well. They can pay you to set up their blog, and populate it with content afterwards. A 2 for 1 deal.