Building your own PC for AI is 10x cheaper than renting the cloud

I have been a huge fan of The Register for nearly 20 years now?

I just love their smart aleck mentality and their reporting is a breath of fresh air in tue computer world.

It is nice for someone else to do the math in this exercise! It ends up that the Register has done the hard math for us and they want to remind us that building a PC is ten times cheaper than using the cloud. I assume it us true for every industry, but for AI, building your own PC for AI is 10x cheaper than renting out GPUs on cloud, apparently.
https://www.theregister.co.uk/2018/09/26/build_own_ai/