A content writer can be immensely beneficial for your website, and any business (whether sole trader, small business, or something more) can benefit from a good content writer.
Ask yourself these questions, and if any are ‘no’, it’s time to start looking into content writing services:
Are you able to write all of the content yourself?
Do you feel confident in how much time you can devote to writing for your website?
Are you prepared to handle all of the necessary SEO research needed to plan and write content for your website?
Will creating content for your website get in the way of your other profit-gaining work?