I imagine quite a while, but long enough to use a couple hundred lbs?
You've got to ask yourself a question, punk. Are you feeling thirsty?
A couple years is reasonable.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk