HA! I commented on that video. You can get a similar result for <$300. Well, maybe not at current prices. But that's about where I am for a single car, pit-to-car setup, with super-het radios.
Those Racing Radios are *usually* business band radio.
I like the stuff he builds, but for a guy always talking about how broke he is, he sure seems to like throwing it around lol
For the grassroots racer, it'd be cool if someone at that level would show normies how to do it for more reasonable money IMO. That system costs more than all my radio gear combined.