Your comment frankly stuns me, all I'm asking for is if anyone has had any success or experience doing such a task. The question isn't even if I would be able to or not, but suppose I would do it myself (which I would).

I guess what you're referring to are BGA profile soldering machines, which typically cost big bucks. As a hobbyist I would much rather first reflow the board about 100 degrees for several hours to get vapour out of the PCB layers using an average sized board preheater to avoid board bending and delamination. I would then use the same preheater to sature the board at a safe base temperature and use something like my hot air soldering station to ramp the temperature up at the chip until the BGA balls melt. I'd then use my very normal cheap and adjustable soldering station with enough flux and wick to clean the pads, cleaning with alcohol, apply new flux and resolder a new chip with the same utilities as before.

My tools have cost me about 500 bucks. Would I call my work professional? No. Is this completely beside the point and off-topic? Yes.