https://www.menards.com/main/building-materials/landscaping-...
Has an extra bathroom, an extra 2-car garage. And modern electrical, and plumbing.
It's not pretty at all. But it's $7k cheaper ($40k), safe, and is to-code legal in most places.
https://www.menards.com/main/building-materials/landscaping-...
Has 1.5 extra bathrooms, an extra 2-car garage, and modern electrical and plumbing. Probably a closer match to the style, at roughly that price ($46,600). Also to-code legal in most places.
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Obviously we're never going to get an exact match in materials. In many cases, you wouldn't want to -- a lot of safety standards have improved since then. But "you can buy what $47k got you for quite a bit less" is a reasonably accurate claim.
If anything -- kit houses at the $47k price tag are probably much nicer today than the were back in the day. (more space, more amenities, safer, etc)