So, demo has just about finished.
The three brick walls that remain in the following photo will be part of the new house, they will not be torn down.
Some good news, some of the existing footings are adequate to support the new construction. So we do not have to dig them all up and pour new ones in their place. This saves money and time. The opening that one can see at the back of the house will become a new wall with a very large sliding glass door that opens from what will be the kitchen/dining/family room area onto the backyard patio (indoor-outdoor living).