Several possible avenues to research would be:
1. PLR Sources
Now a days, PLR articles and content are a dime a dozen. Because it is so
popular, you definitely do NOT want to use it straight out of the box, how-
ever, PLR is a great STARTING point and will save you time in that it gives
you the basis of your content which you can then simply modify to fit your
exact needs.
2. Fiverr.com
Fiverr.com is a "marketplace" site which hosts thousands of "sellers" and
"service providers" who sell stuff (including their time and skills) for just
$5.00. When using the method, I would definitely "shop around" the site
to find someone who is suitable with your exact needs/demands. If this
method doesn't work out for you, you've lost all of $5... cheap way to
learn a lesson.
3. Freelancers
Another method is to use sites like freelancer.com, odesk.com, etc. where
you will have just as wide a selection as you would from Fiverr.com, however,
these guys are usually a bit more pricey -- some VERY worth every penny
though.
4. Warrior Forum
Another good place to look would be the Warriors For Hire section over at
the Warrior Forum. Most of these guys USED to be second to none, but now
a days, there's a lot more grifters lurking there as well, however, as with any
thing, you will have to use due diligence and do your homework to find some
one who is trustworthy and knowledgeable in your particular niche.
5. Guest Posters
If you're looking for content for your blog, you could also consider looking for
guest posters. Guest posters are a dime a dozen now a days as well and they
are even better because they usually have proven track records and they are
willing to work simply for a link back to their site.
There are literally hundreds, if not thousands, of places to find people to write
content for you. Those that I have listed above are just a FEW places that've
popped into my head.