I think if it was bought as a dooer upper/to rent out I would have left the doors and windows but if it's her possible forever home then she is right to change them if she doesn't like them. I'd say she will get collabs for smaller items but prob not the bigger ones. I'm not sure how well known she would be outside the fashion world. I wonder how the house came to be for sale? Repossession etc? I wish her all the best