Leave it in Canada. Take another car?

From what I gathered they are moving to Florida permanently so the car would have to be insured in Florida and the insurance company won't touch it without proof it complies with US safety standards.

To shed some light on compliance issue. There is a website ( the name escapes me now) that tells you what the compliance standards are for each State. I found out about it after I imported my 99 Corvette from Michigan. Each state has its own compliance standards...
For I believe a 2004-06 Corvette, to import it to Ontario, there were only 2 States at the time (10+years ago) that you could import a car from. One was NY state and the other was Nevada. The needed compliance, to conform to Canadian standards, was a piece of foam, about 1/8" thick that was placed between the outer front bumper facia and the inner form.
The piece was available from GM Canada (can't remember the price for what it was...crazy) but to install it entailed removing the complete from bumper and surround. Cost prohibitive.
This made the bumper 7MPH instead of 5MPH compliance....
The car had to be taken to Canadian Tire, they were one of very few, shops that could check for the Canadian standards. Some of the issues, like daytime running lights, could be changed by accessing the computer at a dealership...