HUDSON — The basement of the farmhouse built by Stan Christiansen’s great-grandfather has four rooms filled with bottles of wine, all made by the amateur vintner. Christiansen has been told that his wine could hold its own against commercial wines costing as much as $900, and his fans may be onto something. At the 21st Annual Wine Classic, hosted last month by the Greater Kansas City Cellarmasters, Christiansen entered 33 bottles of wine and won medals for all of them, along with a Best of Class.