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.
I always hire a marketer (even freelance or part time) first, not last. A common failure in businesses is to think marketing is advertising. Marketing is many things, including if you even have a space you should bother trying to move into. Advertising is about telling the market what you do and why they should care, but a marketer will write that script.
You will get nothing for $10 an hour that will motivate anyone, including yourself. You should save this money. If your budget for the "pilot" is so low, your budget for the airplane will be nothing. As mentioned above, marketing is an investment that will drive your success or failure. Depending on your location you may find it lower cost (Boise versus Manhattan) but cost should not be your driver, it should be quality of output to reach your audience. As an interim thought, however, given you are non-profit, you may reach out to local universities for interns in marketing that will experiment with you as you experiment with them. Because you are non-profit, they may get some credits for the effort but you need to be aware they will produce based on their experience not that of a high quality "expert" marketer.