Well, judging from what few particulars the OP has given us -- the son hopes to save $72,000 over a couple of years by not paying the mortgage, or rent -- it looks like the nut is something on the order of three grand a month. So it's doubtful it was ever a million dollar property. Seems likelier it was a $400K property that's now worth half that. And that would be a very difficult situation for most people.
Yeah, I know, that's assuming quite a bit. But what we aren't assuming is that the fellow hopes to keep a roof over his head for upwards of two years without paying so much as a dime for it.
You're right, we don't know all the factors at play in this particular situation. But I do know that I've had dealings with people who clawed and scratched their way out of financial holes, and I've had dealings with people who repeatedly walked away from real estate contracts and filed for bankruptcy protection, and while I readily acknowledge there is such a thing as bad luck, and that some people come into the game with considerably greater advantages than others (I hold in particular disdain people born on third base telling the rest of us how to hit a ball), I have a great deal more respect for those in the former category. It seems that those in the latter category are aways running into bad luck, you know.
I think there might be more going on than meets the eye. From what I have observed, people are very reluctant to admit the depths of financial problems and often let things get pretty bad before they try to fix things or take any kind of action - such as defaulting or refinancing or whatever the action is. People get very emotional and guarded about money. I am not saying for sure this is happening, but It wouldn't surprise me if the financial issues were deeper than we know and the resulting emotional issues are playing a role too.