Fair cost for drywall patches & repairs before paint?

[Lara Fobian]

Opinions, please?

I have a rule-of-thumb for how much interior and exterior house paint should cost in labor and materials per square foot, over surfaces in a decent condition. 

But if the surfaces need a good amount of repairs first, do you have a way to estimate a fair cost JUST FOR THE REPAIRS PORTION of the job? (assuming the repairs, texture, and paint are all done by the same crew)

Repairs like 1) drywall patches + texturing, 2) repairing cracks and drywall joints + texturing, 3) scraping off bad, flaky paint, 4) washing and/or degreasing surfaces that need it, 5) filling holes or divots, and 6) even trimming back any plants or tree limbs touching the house area to be painted?

I know this might be asking a lot, but I’d love to have a fair pricing rule-of-thumb for each of those specifics.

I APPRECIATE YOUR HELP, THANK YOU.

Lara Fobian