Yeah, I feel this :)
I learned it from Superfastmatt. He needed a piece of plastic that retails for $1500 for his van, so he said: “either I have a $1500 solution or I have a $1500 solution but I get a free fancy 3D printer in the end…” that stuck with me.
I have a brake bleeder, an oil change jugs with a cap on top and the side, cellphone tool kits, and more...
Sometimes it takes a while to derive the tenets of labor specialization from first principles.
How many of us can make more making nets for fishermen than making nets AND fishing yourself?
I also did a USB switch project for fun, and ended up spending probably $250 for something I could have just bought for $15, but it was a great experience. (Here if anyone is interested: https://shielddigitaldesign.com/posts/2021/susb/ )