Our vastu house had siding, and was a ranch style. It looked like a regular house. I don’t like the ones in the photos either – they are real weird looking I think.
Vastu refers to the layout and other features I described, but you can make the outside look like Tuscan, Mediterranean, log cabin, ranch style, stucco, anything you want.
Straw bales are great – my best friends in Phoenix built one back in 1991. The walls were so thick! Wonderful. Again, you can use straw bales to make a vastu house too.