I'm glad you like it, and thanks for the tips!
I was not aware of the -jN argument to use more cores, and it could really help for full rebuilds as my VM does have a 4-core CPU.
That's also one of the great advantages of VMware over VirtualBox, which doesn't have a proper multicore implementation.
For now I'll leave the guide as-is though. Those who read it will probably read the follow up posts too, so they are likely to pick up your tips anyway, and I feel like I've typed enough for one day already...
Best regards: dlanor