Am I making progress? It is hard to tell.
I am trying to boot my installer partition. I have progressed from kernel panics to hanging.
First thing was disabling options from the DSDT mask. I started with 0xE033, but that gave a KP of "Unable to find driver for this platform".
I disabled options one at a time down to 0xE013, and the KPs changed to "Unsupported CPU Family". Somehow my boot args had been cleared, so I rebuilt the config file to keep

boot args "-v npci=0x2000 slide=0 WithKexts NoCache"

My System now hangs at "MAC Framework Successfully initialized using 16384 buffer headers and 10204 cluster IO buffer headers"

Lots more to try!