owners of these sorts of houses already pay plenty of taxes that way
because, unbelievably, in a fair and equitable tax system, tax liabilities are based on ability to pay. Or, in case you don’t understand, those who have more contribute more,
I’d be all in favour of a tax break if the houses qualifying for and taking advantage of it are opened to the public. after all, if they’re part of the heritage I’m supprting, I should get to have a look.