Complex sentence: Around that time her half-sister Wynonna Judd gave her a historic farmhouse and some land in Williamson County, Tennessee, so she moved to Tennessee; that house has been her primary residence in the US ever since.
Split into simpler sentences: Around that time her half-sister Wynonna Judd gave her a historic farmhouse and some land in Williamson County, Tennessee, so she moved to Tennessee. That farmhouse has been her primary residence in the US ever since.