I have a 1928 stick frame house with what appears to be the original siding with vinyl siding over that. As far as I can tell there isn't any insulation in the walls of the house. The vinyl siding needs to be repaired or replaced and I'm toying with ripping everything off down to the studs and upgrading any electrical I might need to and then adding insulation, sheathing, house wrap and then putting on new siding. It's not a very big house and the layout is pretty simple so I can do all of the work myself. Is this worth pursing or is it better to just blow some insulation in the walls and call it a day?