Most people I hear talking about Sosua beach club don’t think it will open in January at least not completely. I’m going to Sosua Jan. 21th I can let you know if it’s open or closed but I guess that’s too late for you.
Take a look at this link (red building should be SBC) but its computer animated
www.amhsahotels.com/resorts/sosua_bay_club/index.htm

Rob