Apparently, residents of mobile homes still are, at least according to the coverage in today's The New York Times Magazine. The article explains how Frank Rolfe exploits them. He views the trailer parks he owns as "people's last resort." Here is that amazing article.
There is another side to this story. That is that wholesome, productive, financially secure members of society live in mobile homes and have no intention of "trading up to a real house."
Mobile home owners and renters have to launch a grassroots public relations campaign to tell their story. Each week, they can take out a full-page ad in the NYT to feature one of their own. Those could include the RN (perhaps has a BN, too) who oversees a nursing home people around the state fight to get their parents in. The boy who sold the most coupon books as his church' fundraiser. And the retired couple who adopt troubled teenagers.
The money for those ads could be crowd-funded from all who also have been underestimated because they did not live in one of those "Father Knows Best" two-story single houses. You bet, I will kick in.