Lancelot
Adventurer
As per the 5e PH, a gallon of ale costs 2sp and a skilled hireling costs 2gp per day.
Hence, the answer is obvious:
1) You build a pool approximately 267 feet long, by 125 feet wide, by 10 feet deep. You fill it with ale (500,000gp = 2.5 million gallons).
2) You then hire 100 nubile, attractive, consenting persons of legal age and your choice(s) of gender... for the next 2,500 days (nearly 7 years... your liver is unlikely to last much longer than that, thanks to the ale).
You have now achieved adventuring nirvana. It doesn't matter if the world is ending; you're going out in style.
Hence, the answer is obvious:
1) You build a pool approximately 267 feet long, by 125 feet wide, by 10 feet deep. You fill it with ale (500,000gp = 2.5 million gallons).
2) You then hire 100 nubile, attractive, consenting persons of legal age and your choice(s) of gender... for the next 2,500 days (nearly 7 years... your liver is unlikely to last much longer than that, thanks to the ale).
You have now achieved adventuring nirvana. It doesn't matter if the world is ending; you're going out in style.