First of all, this property is elevated. It’s clearly not sitting at 5 feet of elevation. Second, $12m is peanuts for a former president.
Even if he's made more since then, 10-15% of your net worth definitely isn't peanuts.
Not to mention being as high profile as he is, and talking "my legacy this and that", you'd think he would have paid more attention as to what kind of message he's sending by doing that.