OSHKOSH - Sunnyview Expo Center is slated to expand after the Winnebago County Board of Supervisors approved a land purchase. The $175,000 purchase will add 20 acres to the site, which will go toward increasing parking and camping areas. It was approved by the board on Tuesday. County Executive Mark Harris told the board that the county does not generally approach landowners for a potential purchase if the land isn't listed already, as the act of doing so triggers eminent domain, so movement on this land was triggered by the land being put up for sale.