Says built in 1970 so likely designed in the late '60s. That explains a lot.
Being only about 30 miles from me I'm a little surprised I've never seen/heard of it before, it is a bit unique.
Even if I had the money I wouldn't be interested in most of them. Way too big I have absolutely ZERO desire to have that many people at my house even to visit for a day let alone spend the night.
With that kind of money I opt for a more modest house of 2000-2500 sq ft on as big a piece of land as I could swing.
This would do OK.
https://www.swranchsales.com/7500-ac-mcalester-lake-ranch.html
Well, you'd have four extra houses to send guests to.
I actually think like you. I don't want a dinky house, but I don't want a ginormous house to have to take care of, heat, etc.
As I've been looking in Idaho though, all the areas I'm interested in, especially those by the Snake or by a little lake or something, are like 5000 sq ft. Either that or they're 70 years old with three bedrooms and a single bath and somewhat confined architecture. It's starting to look like if I want a modest house house built with newer, efficient materials and design, I'll need to buy the land and build.