Every 20 minutes isn't really that surprising, especially when you've got the money to buy it. You're already coming down from the peak about 5 minutes after a hit. There's a bit of a tail, but I've seen plenty of people hitting the pipe the second they start coming down, and those people didn't have millions of dollars to buy more.
Only for special occasions. Like when the sun rises, early morning, late early morning, early mid morning, noon, after noon, late afternoon, dusk, evening, sunset, night time, when the moon comes up, when the moon goes down, etc.
This reminds me of the time in my early teens when my mother described herself as a recreational drug user and I said "If I woke up, went kayaking, had breakfast, did another little quick kayak before getting ready. Got ready for work and had a quick kayak, went to work and then kayaked on my lunch break, kayaked on the way home, spent most of my afternoon kayaking, so much so that I forgot to pick my kids up from school until really late, and then went kayaking all night and had to kayak one last time before bed to sleep well, literally fucking nobody on this entire planet would describe me as a recreational kayaker." which she thought was hilarious, and to be honest kind of was.
...I thought this was talking about Joe at first. Somehow, I was perfectly willing to accept the idea of Joe Biden playing indie rock and smoking crack.