Howdy, consider contacting you homers insurer and inquire if any discounts in your cost if you use cellulose or fiberglass. Cellulose is treated to resist bugs and rodents and fire- fiberglass is not. What type of exterior siding do you have- consider too the air barrier advantage of cellulose verses fiberglass and the cost of replacing all the exterior wall drywall add lots of $$ But also allows a rewire of the home great time to consider this upgrade if walls open it a no brain er. One can install cellulose from the inside and cover the holes with moldings which really add some design upgrades to the home too. Read about insulation an moisture issues too before you jump in as i would not uses a paint that does not allow moisture diffusion if cellulose in walls. I have learned a bunch about these issues at : greenbuildingadvisor.com/blogs/dept/musings/vapor-retarders-and-vapor-barriers
Any an all of my comments are just my opinion and not to be confused with facts.