Our hero talks about hiring writers, the pros, the cons, and the pitfalls.
There is a service that is oriented to affiliate marketers called Content Refined (affiliate link so I get a commission if you buy it- thanks!). They do a better job than the general services but it’s relatively expensive compared to hiring a writer from Upwork.
The upside is they write great content and it’s a full-service situation. So Content Refined will even do keyword research for you if you don’t want to. If you do the keyword research, then it’ll be cheaper overall.