ZEELAND — The former Sligh Furniture Co. manufacturing plant, a building that has been on the Zeeland City Council s redevelopment wishlist for years, has been purchased by a prominent Holland-based development company.Geenen DeKock Properties, the sister company of GDK Construction, bought the building at 349 E. Main Ave. in October from West Michigan Office Interiors Inc., which has been using the former factory as a warehouse.GDK has been responsible for many high-visibility Holland