The jacklegged stuff is all over, in & out with whatever was once good. Still has some old K/T, old cloth NM & various newer stuff tapped in everywhere. Open boxes, 120 tapped from 240, etc. 1 of the biggest messes I have ever seen. The only sensible thing to do is slash, burn & replant.
Plus, if I could do it in smaller stages, the permit cost would escalate. $75 to 100 would be permit charge every time. I can keep it to about 150 or less if I do it in 1 job.
I am looking at a whole house rewire next few days. Maybe they will have a usable panel & breakers I can use on his house. I hate even thinking that way but we sometimes get forced into corners.