Any number suggested by any person on this board would be meaningless- they don’t know. Even a ballpark range would be no more than an uneducated guess.
The only estimate that means anything has to come from someone who is ready, willing, and able to do the job. Ask some local painters for estimates, then you’ll know for sure.
you are looking at around 30 to 40 cents a sq foot including windows and doors, for example a wall that is 8 feet high by 10 feet wide is 80 square feet, so at 35 cents a sq foot thats 28 dollars. If there was a window and a door in this wall it does not change the price.