42 years of marriage, well you are doing something right (coming from a guy who has been married 32 years)
However I do not understand your wife's logic of wanting copper lining in those wood gutters. No one is going to see the copper lining so why go to that expense? (It has to be costly to form that copper lining into the gutter, along with the expense of the copper)
Personally I would line them with vinyl and then use wire for the antenna as others have suggested. By doing that you will not have a joint in the lining as you will if you split the copper lining. And vinyl is going to outlast you (I hope you make it to 172 but ...................
Good luck either way you go.