It's been discussed many times, he's had it appraised and it's not as much as one would think - high 6 figures at best. Would pay for ~5 years at their current spend rate. But yes, that will likely happen and with their retirement savings and social security they'd have to move to a LCOL area.

Basic point is, if my father had truly earned the income he claimed for decades against the lifestyle lived, they should have a retirement nipping at 8 figures; living out retirement in relative luxury and going on fantastic vacations on the regular. Instead they will have to economize and there may be a point where I have to kick in financial assistance.