What does the fact that he lives in a trailer have to do with anything?
Pick on his cab.....
But leave his home alone.
Please forgive the stereotyping!! I just found it rather amusing!

Come on mate ! , I'm sure you've heard the stabs before. All about those who live in a trailer...sort of simple-minded folk if you will. All I did was make a comparison as to why the cab looked the way it did. Simple Cab - Simple Folk ! No harm intended mate !!

PS ... It's your own society that places these labels upon the heads of your fellow brethren. Personally, I could care less if he lives in a trailer, log cabin , high rise ... or even a cardboard box(with wheels). I was wrong to associate his stylish cab with his convenient living arrangements.
Anywhoooo, I've been in the US long enough to catch a few slangs, learn my own simple way of life ... and even make a few friends , who do happen to live in a house on wheels....the first time my mates took me to a show .... we caught Jeff Foxworthy at the centre. I couldn't believe all the things this guy was talking about ... that is until I was told it's all in good fun, a joke upon sorts. Same rule applies here! I was just thinking about when I had seen the show.

I always have to explain myself to
y'all 
Relax mate ... have a good time.