Subject: Re: BRK Organization After Buffett? An Opinion
"I installed Pihole several years ago in my house."

I've wanted to install something like this for a few years now. What are you running it on? A Raspberry Pi? Can it keep up with the traffic? We have 50+ devices connected at our house at any given time.

I am running it on a Raspberry Pi Zero W I bought on Pi Day 3/14/2017 right after they came out, bought several for $3.14 each.
Nowdays you would want the Zero 2W, for $15. $15.47 from Aliexpress with case, free shipping.
No case, just a short USB power cord. It is plugged in to the USB port on the router for power.
It only has WIFI, which was faster than wired Ethernet via a USB dongle. Kinda weird, using WIFI for a distance of 6 inches.

Router & DSL modem & VOIP adapter are plugged in to a low-end $15 (on sale at Sam's Club) UPS, which will run them all for more than 24 hours.

It works fine, we've got probably 2 dozen or more devices. Our toaster over even has wifi. As does the dishwasher.

DNS on each device caches the lookups after the first lookup to the DNS server (the PiHole device), so you will not see any slowdown.

I just did some tests. On an initial lookup the Pihole was about as fast as going directly to 8.8.8.8 (dns.google) -- 0.13 seconds. On subsequent lookups it was lightning fast. 0.06 seconds.

Follow the Pihole setup instructions and you can have it set up in a hour. The hardest part is configuring your router to tell your devices to go to the Pihole.

People talk about also using "unbound". I have never seen any reason to use unbound, it just adds complexity.

There is also a way to have a 2 Pihole setup with automatic failover. Easy to set up if you want to add that complexity. In all the years my Pihole has been running, I have never had a problem with just the one Pihole, so I never bothered.

Pihole sometimes blocks a site that you don't want to block. My bank's login server happens to be one. It is very easy to whitelist those.

My son doesn't have Pihole at his house, and I am always amazed at the extra garbage I get when I'm over there.