Not many years ago, I lived in a house that had been built in Portland, Oregon in the late 1800's ...
When I was dinking around in one of the back bedrooms, trying to figure out how to make it liveable, the wall plaster started coming off the walls.
No wonder my heating bill was out of this world when I left the door open on that room!
They had used slat outer walls, wooden shingles on the outside of that ...
insulation was a combination of chicken wire, plaster and newspapers ...
At the time, that wall had held up almost 90 years in a moderate, humid temperature ...
Probably, the best priced insulation you can buy is papered on one side, cut at 17" (might be between 15 and 17 inches) just big enough to fit between the studs ...
The beauty of newspapers is: even if they get wet, they do not freeze ... but, they have a lot of insulation benefits .... that is why the homeless keep them very handy ... cardboard boxes ...
it really depends on the amount of humidity in your area ...
but, "kosher" insulation is probably more comfortable for DH to plan for.