"Manufactured Homes" as the lady who lives in a trailer often corrects me, are a weird thing.

They have advantages, like you can always crawl under them and fix things. Which you often need to do, which is a disadvantage.

New manufactured homes cost a bundle.
Well, not as much as having someone build you a small house
but since i can do it myself, i can throw together a small house in no time.

What we really need, is in highschool, to have a REAL shop class where all the boys build themselves their first home. Probably like a garage with an apartment above it.
Then these boys would have some real life skills and at least know a bit about how their house was built. (no class will all be professional builders after a year. Some of them will need a lot of help)

The thing about trailers, is, as you say it, they are cheap.
Mostly because resell value is through the floor.
And they come on a tiny, tiny lot... also cheap.

Soooo, when you can't afford much, it is where you end up.