Clearly a case of a person enjoying building the shop. It's hard to see how this gets used much beyond storage. You try to do anything in there, and you will have a massive mess that takes hours/days to clean up.
Seeing things like grinders in spaces that will make a mess, while it looks like many are on wheels, you would thinking he would have them in booths/nooks or something to capture the mess, that or the tools don't get used. If that space is used regularly, I can see him having a full time employee who does nothing but clean. I would guess it's a shop more for storing gear to go in the field, getting employees together, prepped for the day and such.
Definitely a lot of work there, and for sure building it is a skill learning/improving effort.