Writers can hurt you!
If you rely on someone else to do the writing for your site you may be in trouble if they up and one day stop deciding to write for you. YOU NEED to have more than one writer at all times contributing. If someone else is going to be your only source of content you should have a minimum of two writers, and if you can’t afford two writers at the same time you should have a cache of a couple articles that can hold you over until you can find a new writer.
I recently had a writer start lagging and my site has been suffering due to the lack of new content. Writers are awesome and can really help you but if your site gets popular and it’s based on articles not written by you then you can be in a real JAM if the writers decided to leave.
So, my advice… get someone as a backup, always have two writers, and/or have a cache of some backup articles to hold your site over until you get a new writer hired.