Obviously I am no expert, but it takes up more than the 16GB RAM my local machine has, and pushes everything else, like the OS so far into swap that the machine is unusable for 20 minutes while it bakes, and the CPU usage is really low most of the time, because the data it needs is not in RAM but in swap. This kind of thing tells me it is way over taxing this machine. I even have AvoidLocalExecution turned on.
I did some major streamlining of my scene last night which seemed to have helped. I learned, to my surprise, that objects in the scene which are hidden still affect bakes. I had a lot of hidden items in my scene to make it simpler to test, but when I deleted them instead of hiding them it got way faster and uses way less RAM. And, gives better looking results. This is very counterintuitive to VFX people like me used to DCC apps which allow objects to be in the scene but not rendered.