The robot that they used is 14k, down from boston Dynamics 75k, and they also have another which is available for 5k which you possibly might be able to do the same thing with it too.
Outragously expensive is not correct if you ask me.
I strongly recommend binding CTRL to Caps lock. It's pretty ergonomic, and just feels natural. Also, that would force you in a different mindset, aiding in differentiation of your Mac and Linux