You know, the small things that can save you a lot of money. I’ll start:
You can get “hospital” powercables that are completely shielded for 20 bucks or so.
You can get anti vibration pucks for washing machines instead of spending 10 times that on the same product which is just labeled as “speaker pucks” instead.
Buying refurbished or ex-display and getting the same 2 year warranty everyone else gets.
Using a raspberry pi 4 as an asynchronous usb streamer, saving hundreds on market sold streamers.