That's the "there is some wizard in the Internet that did it so many time they can get away with half the tools" part ;). The vacuum chamber is also required only for ipad/iphone/touchbar/apple_watch, not most macbooks.

IMHO, most of these projects end up with "I will totally do this" -> "I am blocked for now, but will come back to this tomorrow" -> "I don't want to lose parts, so I will put the pieces in a plastic bag and 4 ziplocks" -> "I need to move this out to clean my desk" -> "2 years pass" -> "what is that bag, oh, my broken laptop" -> "I will never finish this, there is some room in the trash I need to fill".

/me Looking in from of me and my old ThinkPad W541p stares back at me in pieces. (and yes, I dismantled it yesterday to replace the screen cable and cooling unit. Only to find out the new cooling unit has the wrong connector and fan voltage scaling despite being "a factory part for the W540p")

edit: The last time I did a MBP board was my 2007 Santa Rosa 15". I actually did reflow the GPU with a heat gun, but this was very scary. You move even a tiny bit and kiss the board goodby. I wish I had a reflow oven (I still don't have one big enough). BGA reflows are a nightmare.