How closely have you looked at those $40K houses? I've seen a handful of sub-$100K smaller houses listed in my region, but they're wrecks; they'd need a massive amount of work to get anywhere near the comfort and safety level of a modern, well-maintained house. They're basically the house equivalent of buying a $500 car.
Sure, but a $40k house will need anywhere from $90k to $160k worth of additional repairs to be safe to inhabit.
And since that cost isn't in the equity, most people in most areas can't qualify to finance that. (A $200k mortgage is not identical to a $40k mortgage and $160k reno loan).
> 1000 sq ft houses that sell for $40k > because nobody wants a house that small
a 1000sqft house in Palo Alto would sell for >$400K just for the land. It would be a "teardowns", and a $40 house+lot would be converted to a $300k 2600 sqft houses -- quite reasonable, so the explanation lies elsewhere (access to employment, entertainment, educations?)
"Debased" in this context doesn't make any sense; it really only makes sense in commodity or representational currencies, not fiat money.
If you mean "devalued", then you really should say that.
But I'm not sure how the logic works, anyway, unless you assume that those without "real" assets also tend to have a constant and positive wealth of fiat currency, such that decline in fiat currency value has the same effect on their net wealth.
I really think there is, at most, a coincidence or possibly common cause here rather than the causal link you suggeset, which I don't see any clear rationale or evidence for.