We are looking at buying a house that was originally built in 1930. The original house has not had much done to it at all and is need of a gutting to the studs. There is a giant addition that was put on above and to the right of the old house making sort of a house within a house. We have some grand ideas of what could be but do not want to get in over our heads. How can we estimate what a gutting and rebuild of the old part would cost?