Subject: Re: Thoughts on Berkshire withdrawal strategy
So I used the tool Adrian mentioned at https://testfol.io to backtest a $60,000 fixed annual withdrawal (not inflation adjusted) from a 100% Berkshire portfolio.

After 10 years (7/1/2015 - 7/1/2025) withdrew $600,000 end with $2,268,557.67.

After 20 years (7/1/2005 - 7/1/2025) withdrew $1,200,000 end with $3,863,737.32.

After 30 years (7/1/1995 - 7/1/2025) withdrew $1,800,000 end with $9,637,405.03.

I guess that makes sense. You're more likely to end up with way more money in the end.