Yes. A tornado F3 or higher intensity could definitely destroy a mansion.
Yes. In a strong enough tornado wind and debris carried by the wind can destroy houses.
Tornado Alley itself is not destructive, but the tornadoes that frequent it can be. The tornadoes in Tornado Alley destroy many homes each year.
Yes. A strong enough tornado can destroy just about any manmade structure. A tornado of high EF3 intensity or stronger should be enough.
A strong to violent tornado could potentially destroy a portion of it. But the area appears too large to be covered by a tornado.
Its possible
A Tornado can destroy a village or a small town in a matter of minutes.
Tornadoes do not eat. They are not alive. Tornado often destroy buildings and trees, but they do not eat them.
An EF2 tornado is fairly bad. Such a tornado can tear the roofs from most houses and destroy mobile homes.
It depends on how strong the tornado is. If its a weak tornado then most likely it can not, but if it's a very strong tornado it is very possible that it can.
it can destroy everything
It depends on how strong the tornado is. A weak tornado (EF0 or EF1) will generally only destroy small trees and weakly built structures such as sheds and fences. Stronger structures will only take minor to moderate damage. A strong tornado (EF2 or EF3) will destroy most trees, vehicles, and some buildings. A violent tornado (EF4 or EF5) will destroy just about everything in its path.
Tornadoes can destroy as much houses as it can depending on the length of their path. Most tornadoes are too weak to destroy houses, causing mostly superficial damage. However, in the works cases a tornado can destroy thousands of houses.