What is the cheapest way to get the center of the Austin Center Blvd Waterford.?

I am in Austin, Texas this weekend for SXSW, but I stay in hotel (free to), which is about 10 or 11 miles from the city center in Homestead Austin Center in Waterford. I wonder what cheapest, most effective way to reach to the center be? Is there a bus near or likely to take? Otherwise I I have to charge $ 25 or $ 30.

In the concierge at hotel its

Alex Jones Leads Rick Perry Protest In Downtown Austin..2