Re: 1926 California Bungalow
The order should be:
structure report; rehab planning (and design if layout is to change); structural remediation, then address and roof/water intrusion issues that could cause deterioration of the finishes/structure; then the rehab can begin in the normal order: framing; windows and exterior doors; HVAC; plumbing DWV rough-in; water supply rough-in; electrical rough-in; insulation; wall finish; floors; cabinets, millwork, paint, fixtures, carpet. For an old house you also have to work in any specialized trades that will address particular issues of conservation of significant features and things that require special handling like antique fixtures that will be repaired or rehabbed and refinishing of woodwork, lead mitigation, asbestos mitigation, custom floor finishing, etc.. These tasks have to be integrated into the job in a timely way.
Remove not the ancient landmark, which your fathers have set.