[R} Don't try this at home

You can do this at home if you are capable of handling industrial acids (and fun things like sodium cyanide) responsibly however it is generally not profitable due to the amount of equipment, time, consumable chemicals and energy used unless you (1) have a very cheap (preferrably free) source of waste electronic components and (2) have the space and time to process in bulk.

Plus you end up with a lot of waste electronic material and contaminated acid mixtures &etc that you still have to dispose of somehow. It's not a good way to make money at home, it really only makes sense to do it at an industrial scale.

Cody did a very detailed video on recovering gold from RAM