Belfast Telegraph, 1 June 1871: May 26, at Rosnashane, Isabella, wife of William Anderson, Esq.August 1845 William Anderson of Rossnashane was advertising in various Belfast newspapers for contractors/builders for building an extensive farmstead.
Wonder if this is the property?
https://www.rosnashanehouse.com/"Set amidst a 500 Acre Working Farm, Just outside Ballymoney in Northern Ireland with views to the Sperrin Mountains & Beyond, Parts of the house date back 300 years…."
Property was sold by the Moore family c1840-
https://lordbelmontinnorthernireland.blogspot.com/2015/03/the-moore-baronets.html