Just read the whole of this thread over Christmas. Mega jealous! Current day job as a software developer leaves me missing proper hands on work. I've done 3 or 4 soldering repairs this month but I'm itching to do some more advanced board level stuff.
Looks like we'll be moving house in the next few months but as soon as that's done I'm filling out the tool set with hot air and one of these:
https://m.aliexpress.com/item/1005002547115609.html
Basically it injects power to anywhere on a board and allows current to flow, and you can figure out where a short is. Can even use a thermal camera to highlight exactly which component has failed or is receiving too much current.
Especially useful for complex stuff like laptops but probably good for graphics cards too, or anything that charges. Learned about it after binging on this guy's videos:
Sorely tempted to start buying bits now but I'd only struggle to keep it all tidy before we move. I've got a laptop board with a charging/power MOSFET issue so I know what project 1 is
Then it'll be the box of 3x PS2s!