If money is an issue and you want to keep your site with minimal cost, then I'd suggest you create your own content yourself at first. Outsourcing is an expensive thing especially the good writers. So in my opinion, it depends on your budget.

I have sites that I have completely outsourced and they work great. It is your choice. If you grow big enough you cannot do it all and will have to outsource or hire in house employees anyway.

Most people would probably tell you you are better off writing your first set of content for yourself so you understand what goes into it. Then after you get familiar with how to do it, what works, what doesn't, you can more easily check the quality of someone else writing content for you. I would suggest you write some of your own content for sure just to get a feel for it. You can do things like only give yourself 30 minutes to write and just see what comes out...Then edit it later.