cost to insulate per linear foot?

[Jason Douthitt]

I finally received my first contract to wholesale! I noticed that there is no insulation in the exterior walls and since the drywall mostly needs replaced anyway, I was wondering what to estimate for that budget? I am trying to put together an estimate of rehab cost for any potential buyers. Any help would be appreciated. the property sits in Broken Arrow, OK. 

1089 sq ft

146 linear ft of exterior wall space 

Thanks