Oh by the way AllInLife is right, this is a study hand, not one you're going to encounter. And the thing to study is the turn action: Ultradeep stacks make it poor to continue slowplaying on the turn unless you will definitely still be holding the nuts at the river.

Also, think about the river bet if one of those bad cards comes. It's not "how damn unlikely is it to get beat with quads?" It's "What would a straight-flush bet here?" (Hint: not 12,000) The bad news is a straight-flush would bet about the same about as the nut flush, or a boat.

The good news is it's not your salary for the year. So if you don't mind being ribbed a bit about assuming you're beat even when it's unlikely, you save a few bucks by just calling a midsize bet there.