has many videos where a house is very small and low impact. I always wonder how many "so low of an impact the building codes don't allow them" houses there are too. For example the video below is certainly super low impact, and you could pretty much walk on the roof and not know it was there if it didn't have the walking path in the front. But as soon as the Department of Making You Sad finds out it's toast, so the cautious person isn't posting videos advertising it. I'm a fan of the green roof also providing shelter from the roving eye of Google Maps- used to be that Cob Cottage Company in Coquille Oregon was only visible due to the greenhouse, but now several of the newer buildings are missing that green roof and they stick out when you zoom in. I'm not sure what kind of vegetation I'll try growing on my future green roof, probably some combination of perennial groundcover and flowering plants for bee food, which doesn't require real deep roots. Tap roots and waterproof membranes don't mix! It's annoying to think that a person would have to "throw away" money to build the minimum permitted by code setup including concrete foundation and septic, and still have to hide "accessory buildings" from view to live in a space you enjoy without it costing hundreds of thousands of dollars.
Being Paul-tall myself, I don't see this being an option no matter the shape of my knees, but more power to him! I think an Oehler-Wofati house would be great, so long as you build where there's no codes to be turned in by the neighbors!