It’s hard to shake that feeling of a “trailer park” with the current status of these dwellings. I think the connotations associated here are the blockers.

What happened to sears-catalog-style kit homes where they just drop a huge pile of lumber off? Yes you need permits (as does manufactured housing) but I’m willing to bet municipalities would treat common designs the same similar to housing developments where there are like 5 floor plans with only minor variations between each structure. It’s not close to the same but you already have land and a flat surface, I would greatly prefer this option.