Despite Viña [1]’s historical reputation as an elite beach resort, there are several economical alternatives south of the Marga Marga. When the Argentine economy is weak, as it has been in recent years, weak demand can depress hotel prices, but Chile’s strong peso has meant rising prices for everybody.
Links:
[1] http://www.moon.com/destinations/chile/-chilean-heartland/vina-del-mar