Lucky you to have visited Buffet's house!
I "visited" Buffet's house about a decade ago or so when I drove from Chicago to the Bay Area to move there.
"Visited" is rather generous - I went by it, saw some security, took some selfies and pics, and paid my respects at the Steakhouse :) Now I wish I had sought an opportunity to visit him in person.
Anyhow... BRKB has been in my portfolio for 20+ years. (Now dwarfed by other Tech equity)