I would guess it's because most people's experience with manufactured housing is the base model kind, where everything is super shoddy.
Also lack of exposure to some extent. People can only dream about what they know.
Re:Small World: The Tiny House Trend
by WalterSear on Tuesday February 05, 2019 @11:59AM
(#19087131)
Manufactured housing comes without the desired social signaling.
For these quoted build costs, you could do a pretty highly upgraded singlewide, and it would age better than any of these and can actually be permanently installed onto a foundation.