Healsville,
During the past Vintage I worked in the yarra for 3 months. Healsville would have to be the busiest tourist town in vic. Will this facility be open for public viewing as are most of the cellars in the area. Perhaps you could have a cafe and a dining area with a large glass panel to seperate the two areas. Then you could go really commercial.
Yarra is good for pinot but not for public bio.