Hell, just mandate that all trailers be built to withstand an F5 tornado. Problem solved!
I keep thinking of the FAA’s 30 ton poured concrete reinforced electronics shelters. (Ten tons of rebar encased in 20 tons of concrete.) About as big as trailer but lots more storm worthy. Anyone who’s been in one will tell you that that’s where they want to be during a Tornado.
Also, with a jillion BTUs of air conditioning and a one inch diameter steel grounding cable.