So the house that was destroyed by the Eskridge, KS tornado appears to have been a warehouse type home, which is essentially a pole barn that has been converted into a residence. Looks like it was totally destroyed, but I really doubt that a structure like this would hold up as well as a typical house, especially given the lack of interior walls.
Agreed, rather flimsy against a tornado. Can't recall if there's a specific category for these but would rate very low. I need to brush-up on the survey stuff again, been a year since I last read it and my mind ain't what it used to be for remembering