To solve the receptacle requirement just buy an a/c disconnect that has a gfci receptacle already installed in it. It's no big deal, other than you need to run 3 conductor .. (has a neutral) .. to the disconnect. Or any outside gfci receptacle already existing that is within 25 feet will satisfy the requirement. I suppose if you don't have or put one in the world will not quit turning but the HVAC guy will like you for doing it.
You will most likely need to go to an electrical supply to get one I don't know if the places like HD or Lowes carries them but you might look.
I will agree that in almost all cases a non-fusible disconnect meets requirements for single family homes.
JB... why can't it be 25' above the unit.......