Trailers keep poor people poor. Period. More than half of all Americans have little or no wealth outside of their home equity.
Why buy a depreciating asset when an appreciating asset can also serve as adequate shelter? Interest rates are crazy high on trailers and have short terms for a reason. The best interest rate you will get on a trailer -even with good credit- is 8% Some people pay upward of 10 or 11% -all the way up to 18% on a trailer. In the example given, an 80,000 loan on that trailer would cost the same per month as a payment on a $102,000 loan on a house over 15 years-IF your credit is excellent.. Thirty years down the road the trailer have little or no value. And even if you take great care of it you will have a hard time selling it because it is virtually impossible to finance a 30 year old trailer.
It is symptomatic of our consumerist culture that poor people buy 2000 sf doublewides with all new everything to end up with nothing, when for almost the same monthly payment they could often find a small beat up foreclosure house, work on it by and by, and have something of value in the future. Poor people might as well buy a huge monster truck or clown car for 50k-it won't be worth much in 20 years either.
I live in a 1200 sf house that is over 100 years old and minus the land value (5 acres) it was valued at around $30,000 when purchased in 2006. My neighbor lived in our house in the 1940's when she was a child. Sometime in the 1970's her father thought our house was in "too bad a shape" and bought a trailer. By the mid 90's that first trailer was in "too bad a shape", and he bought another fancy, state of the art trailer (at the time at least). The first trailer had to be torn down and the second doublewide is now approaching a point where the cost of needed repairs exceeds market value. Meanwhile my husband and I have put $5000 to $7000, and a lot of sweat equity of course, and it is now worth probably $50,000.
That said, my mother sold her three bedroom house with pool in Florida and bought a 20+ year old trailer in a 55+ park. The park was really nice, very safe, and she had lots of companionship with folks her own age. She also had a crapload of money from the sale of the house that she used to travel and visit her kids.
If there is no chance that you will outlive the trailer it is probably no worse than renting. If you are under the age of 70 stay away. Buy land and move an old Airstream trailer from the 1960's on it. It will not only outlive you, it will be worth more than you bought it for if you need to sell.