c.1767 New england house ARV help needed

[Richard Walters]

Hey BP folks. I'm working on a property flip analysis on a c. 1767 New England house in New Hampshire and a few aspects of the house have me perplexed.

Does a renovated antique house warranty a higher asking price or only add to the charm? The property has a 4000 sf barn and a 3000 sf double garage/carriage house. The entire property needs major updating and renovating after decades of deferred maintenance. I'm struggling to find local comps with similar attributes to come to a realistic ARV.

What value does a barn, large double garage bring to an antique New England house? Any advise is greatly appreciated.