Brewing on a small scale is a young man's game from what I can see. The physical labor is demanding, it can be hot, the hours can be long, things can go wrong and you have to fix it quickly. Did I mention that it can be a hot job?
The wife and I have done 2 batches on commercial systems. One was easy, but that was at Sierra Nevada's Beer Camp, where even the pilot system is mostly automated (lifted sacks to dump in the auger bin, and shoveled hops out of the whirlpool). The other was at Grizzly Peak in Ann Arbor, which has a 7 barrel Peter Ausin/Alan Pugsley 7 barrel system. That was just a big homebrewing system as far as I experienced, 21 times bigger to be exact. That was a long hard day, and we went outside to sit in the 95F temperature in direct sunlight to cool off. I said it could be hot.
For those that brew on such systems, I have great respect for the labor involved. Duncan and his crew (2 assistants) at the Griz turn out some tasty beer, and manage to make >1700 barrels/year on a system that is not automated.
Keith and Leos have my respect for doing this and making a go of it.