Exemption: Real property to unlimited value or mobile home (larger than 240 sq. ft. at its base and registered in state at least 6 months before filing) to unlimited value; property cannot exceed 1 acre in town or 160 acres elsewhere; sale proceeds to $30,000 ($170,000 if over age 70 or widow or widower who hasn't remarried) exempt for 1 year after sale (husband & wife may not double)