You put all of your vacation in one month during a month where you know the company will buy back vacation. You have to be senior for this to work.
One week of vacation buyback = 7 days X 6hours + 24hours = 66hours
66 X 4 = 264 hours
264 hours + 85 (average line) = 349 hours
349hours X $287/hour (WB CA) = $100,163
And when you are senior you get the weeks off you need anyways.