Forget about 'average' -Give us square feet.
???
Depends on the size, if the average one, about 300k in rural place
The cost of repairing drywall damage would depend on how much damage is done. If you were to buy the drywall it ranges from $10 to $30 a sheet. Plus if you hired someone then it would cost more for labor then it would if you did it yourself.
how much an mansion cause
There is no such thing as 'exterior' drywall.
10,000
It would be nice if you cared enough to share the measurements and specs with us - -
Depends on how big the mansion is.
A good taper and mudder would use about 10 gallons for that.
To be called a mansion these days a house would have to cost over a million dollars.
You will be very careful when you deciding for the drywall color. You should not check the color when there is too much light shining on the wall. After that you can find color you want for your drywall repair.
Depends where you are , but usually about 20% more than regular drywall.