There are lots of grants and tuition remission programs for higher ed. students. In my case, my tuition at Drexel is covered and I only have to pay the tax on it. If you can acquire a job at a community college or university, you might be able to receive some type of remission benefit.
My program is in a hybrid format (mostly online with executive weekends once a month). Where are you located and why are you looking for an online program?
Hopefully nada. I work for a private university and am earning my MS through a tuition remission program. In today's job market, I probably wouldn't have opted for grad school if tuition remission were not an option.
However, my husband has about $30K in undergraduate loan debt, so I'll be assisting in paying that off.
The program I'm starting this fall (MS in Higher Ed) has an optional student affairs emphasis and is available in both Philadelphia and Sacramento, I believe.