Flat-out 24/7 high would be 100/day. Pot is a drug that successful people can sustain without any financial issues. Compare cocaine which can quickly ramp into 1000/day and beyond, quickly devastating the finances of even relatively wealthy people.
In the past this might hold true but no longer.
That's pretty extreme, even for heavy smokers, but far from impossible.
I realize I'm being pretty pedantic here, you're right that spend $100/day requires massive usage plus buying moderately expensive weed. But it's not, technically, impossible.
And yeah, definitely not a sustainable or healthy habit...I'm ok now, but my career took a permanent hit. Oh well.