Question on the possibility of retro insulation plastered walls.

Little background on the project buildings.
1920’s prairie or craftsman style bungalows. Maybe 900 sq. ft. each floor.
Balloon framed, 12″ studs. Plaster/Trim etc. is in great shape , homes need new wiring and new plumbing. The 2nd. floor has 8″ base board so I can remove that where I have gable ends and that will provide access for drilling the top plates of the 12′ balloon framed walls.
Here is what I am thinking. Starting from the sill plate:

Block the stud openings at the basement, 1st. floor : cut the plaster out at chair rail height on ext. walls ( say a 3″ wide slice all the way around the ext of the building to provide drill access for drilling studs.), 2nd. floor : remove plaster from short knee wall, install insul mesh.

Use 3″ +/- cut in plaster on first floor to run wiring and and drops to new outlets, switches etc. Use accessed area of second floor knee walls to fish wires into joist bays for ceiling fixtures, and add outlets to 2nd. floor.
Blow in dense pack , build out area of removed plaster with a quick filler strip and cover patch with a chair rail on the first floor and hang new rock on knee walls on second floor.
Plan on removing window trim skirt to blow in under windows .

Any better way ? Any reason this won’t work?

Baths/kitchen will be stripped and plumbed, re-rocked after dense packing.
Just trying to save stripping old plaster and original trim to access walls .