We're a non-profit niche social networking company serving a minority group. We are have a volunteer working on marketing our pending web social network app, however as CEO, I'm looking forward to hire an expert in web marketing tactics mainly to help make our launch a successful one. The main role of the person is with helping us plan with our marketing strategies as well as helping us implement them. We are very hard pressed with resources, what's the best way to hire one which we can afford, at say a rate of $10/hr or even less. I really do not have trust in freelance websites because of the poor quality I've received from them so far.
My hat is off to you for starting a non-profit. That's never easy, but hopefully it's rewarding.
If I were in your shoes, I'd look for someone with experience with the IndieGoGo crowdfunding platform to donate their time to help you with your launch, and gather some volunteers to write posts, tweets, Instagram pictures, etc. that generate excitement about what you're doing.
I say volunteers instead of $10/hour workers, for the same reason everyone else has said that - because you won't get high level help at that rate.
What you CAN do is pay for a Hootsuite Pro account that allows team members to write and schedule posts that won't go live until someone with more life experience and a better understanding of your brand can review them to make any edits or to delete the ones that don't match your brand identity.
If you really want to go cheap and find people to write the posts, you may find them on Fiverr.com, where you can hire people for specific gigs on an as-needed basis. Again, you'll only want them to post to Hootsuite in a way that can be monitored by a more senior spokesperson.
Take a look at LinkedIn for people who have expressed an interest in volunteering for the keywords that match what your nonprofit hopes to accomplish. They'll be there.
Another way to amplify your message is to join a program like Social Buzz Club, Triberr, or Empire Avenue that will let you add links to be reposted by others in those clubs. Club members pick and choose what they want to send out.
Best of luck to you, and look for those volunteers! They're out there!