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 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/ )
https://www.aliexpress.com/item/1005008863940082.html
And here is the cheap hot air rework station I use. <$15
https://www.aliexpress.com/item/1005005989227215.html
You can even opt out of the stencil but I never do cuz it's much easier than not having it.